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2025-09-15 21:12:04 +08:00
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17
.gitignore vendored Normal file
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.idea
.vscode
.DS_Store
**/.DS_Store
.DS_Store?
cmake-build-debug
CMakeFiles
build
cmake_install.cmake
CMakeCache.txt
Makefile
main

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struct ListNode
{
int val;
struct ListNode *next;
};
typedef struct Pair {
int first;
int second;
} Pair;
int getLength(struct ListNode* head){
int len = 0;
ListNode* node = head;
while (node.next)
{
node = node.next;
len++;
}
return len;
}
int* nextLargerNodes(struct ListNode* head, int* returnSize){
int len = 0;
struct ListNode* cur = head;
while (cur) {
cur = cur->next;
len++;
}
int* ans = (int *)calloc(len, sizeof(int));
Pair stack[len];
int top = 0, pos = 0;
cur = head;
int idx = -1;
while (cur) {
++idx;
ans[pos++] = 0;
while (top > 0 && stack[top - 1].first < cur->val) {
ans[stack[top - 1].second] = cur->val;
top--;
}
stack[top].first = cur->val;
stack[top].second = idx;
top++;
cur = cur->next;
}
*returnSize = len;
return ans;
}

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#include <stdbool.h>
#include <string.h>
bool checkDistances(char *s, int *distance, int distanceSize)
{
for (int i = 0; i < strlen(s); i++)
{
int site = s[i] - 'a';
if (distance[i] == -1)
{
continue;
}
if (site + distance[i] + 1 >= strlen(s) || s[i] != s[i + distance[site] + 1])
{
return false;
}
distance[i] = -1;
}
return true;
}

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#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define MIN(a, b) ((a) < (b) ? (a) : (b))
const int INF = 0x3f3f3f3f;
struct TreeNode {
int val;
struct TreeNode *left;
struct TreeNode *right;
};
typedef struct SubTree {
bool isBST;
int minValue;
int maxValue;
int sumValue;
} SubTree;
SubTree *createSubTree(bool isBST, int minValue,int maxValue, int sumValue) {
SubTree *obj = (SubTree *)malloc(sizeof(SubTree));
obj->isBST = isBST;
obj->minValue = minValue;
obj->maxValue = maxValue;
obj->sumValue = sumValue;
return obj;
}
SubTree* dfs(struct TreeNode* root, int *res) {
if (root == NULL) {
return createSubTree(true, INF, -INF, 0);
}
SubTree *left = dfs(root->left, res);
SubTree *right = dfs(root->right, res);
SubTree *ret = NULL;
if (left->isBST && right->isBST &&
root->val > left->maxValue &&
root->val < right->minValue) {
int sum = root->val + left->sumValue + right->sumValue;
*res = MAX(*res, sum);
ret = createSubTree(true, MIN(left->minValue, root->val), \
MAX(root->val, right->maxValue), sum);
} else {
ret = createSubTree(false, 0, 0, 0);
}
free(left);
free(right);
return ret;
}
int maxSumBST(struct TreeNode* root){
int res = 0;
SubTree *obj = dfs(root, &res);
free(obj);
return res;
}

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static int max(int a, int b) {
return a > b ? a : b;
}
static int min(int a, int b) {
return a < b ? a : b;
}
int storeWater(int* bucket, int bucketSize, int* vat, int vatSize) {
int maxk = 0;
for (int i = 0; i < vatSize; i++) {
maxk = max(maxk, vat[i]);
}
if (maxk == 0) {
return 0;
}
int res = INT_MAX;
for (int k = 1; k <= maxk && k < res; ++k) {
int t = 0;
for (int i = 0; i < bucketSize; ++i) {
t += max(0, (vat[i] + k - 1) / k - bucket[i]);
}
res = min(res, t + k);
}
return res;
}

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#include <vector>
#include <queue>
#include <numeric>
using namespace std;
class Solution {
public:
int halveArray(vector<int>& nums) {
priority_queue<double> pq(nums.begin(), nums.end());
int res = 0;
double sum = accumulate(nums.begin(), nums.end(), 0.0), sum2 = 0.0;
while (sum2 < sum / 2) {
double x = pq.top();
pq.pop();
sum2 += x / 2;
pq.push(x / 2);
res++;
}
return res;
}
};

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#include <vector>
#include <queue>
using namespace std;
class Solution {
public:
int deleteGreatestValue(vector<vector<int>>& grid) {
int m = grid.size(), n = grid[0].size();
for (int i = 0; i < m; i++) {
sort(grid[i].begin(), grid[i].end());
}
int res = 0;
for (int j = 0; j < n; j++) {
int mx = 0;
for (int i = 0; i < m; i++) {
mx = max(mx, grid[i][j]);
}
res += mx;
}
return res;
}
};

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#include "math.h"
#include "stdio.h"
// 未验证，leecode使用了 uthash.h 库进行处理
typedef struct linked {
char val;
struct linked *next;
} *HashTable;
HashTable *createTable(int hashCode, const char *jewels) {
HashTable table[hashCode];
for (int i = 0; i < sizeof(jewels) / sizeof(jewels[0]); ++i) {
int temp = jewels[i] % hashCode;
struct linked link = {jewels[i], NULL};
if (table[temp] == NULL) {
table[temp] = &link;
} else {
HashTable temps = table[temp];
if (temps->val == jewels[i]) {
continue;
}
while (temps->next != NULL) {
temps = temps->next;
if (temps->val == jewels[i]) {
continue;
}
}
temps->next = &link;
}
}
return table;
}
int contained(char x, HashTable *table, int hashCode) {
int temp = x % hashCode;
HashTable temps = table[temp];
while (temps){
if (temps->val == x){
return 1;
}
}
return 0;
}
int numJewelsInStones(char *jewels, char *stones) {
int count = 0;
int hashCode = (int) sqrt(sizeof(jewels) / sizeof(jewels[0])) + 1;
HashTable *table = createTable(hashCode, jewels);
for (int i = 0; i < sizeof(stones) / sizeof(stones[0]); ++i) {
if (contained(stones[i], table, hashCode)) {
count++;
}
}
return count;
}

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class Q1281 {
public:
int subtractProductAndSum(int n) {
int plus = 0;
int mult = 1;
while (n) {
int quo = n % 10;
n = n / 10;
plus += quo;
mult *= quo;
}
return mult - plus;
}
};

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#include "vector"
using namespace std;
class Q1749 {
public:
int maxAbsoluteSum(vector<int>& nums) {
}
};

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class Q21
{
public:
struct ListNode
{
int val;
ListNode *next;
ListNode() : val(0), next(nullptr) {}
ListNode(int x) : val(x), next(nullptr) {}
ListNode(int x, ListNode *next) : val(x), next(next) {}
};
ListNode *mergeTwoLists(ListNode *l1, ListNode *l2)
{
ListNode *preHead = new ListNode(-1);
ListNode *prev = preHead;
while (l1 != nullptr && l2 != nullptr)
{
if (l1->val < l2->val)
{
prev->next = l1;
l1 = l1->next;
}
else
{
prev->next = l2;
l2 = l2->next;
}
prev = prev->next;
}
// 合并后 l1 和 l2 最多只有一个还未被合并完，我们直接将链表末尾指向未合并完的链表即可
prev->next = l1 == nullptr ? l2 : l1;
std::cout << "123";
return preHead->next;
}
};

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#pragma once
#include "lists.h"
class Q24 {
public:
ListNode *swapPairs(ListNode *head) {
if (!head || !head->next) {
return head;
}
ListNode *p1;
ListNode *p2;
p1 = head;
p2 = head->next;
while (!p2){
p1->next = p2->next;
p2->next = p1;
if(!p1->next){
return head;
}
p1 = p1->next;
p2 = p1->next;
}
return head;
}
};

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//
// Created by 李洋 on 2023/8/18.
//
#include <vector>
using namespace std;
class Q1388 {
public:
int maxSizeSlices(vector<int> &slices) {
}
};

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#include <vector>
using namespace std;
class Q1572 {
public:
int diagonalSum_1(vector<vector<int>> &mat) {
int sum = 0;
for (int i = 0; i < mat.size(); ++i) {
sum += mat[i][i] + mat[i][mat.size() - i - 1];
}
if ((mat.size() & 1) == 1) {
sum -= mat[mat.size() / 2][mat.size() / 2];
}
return sum;
}
};

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//
// Created by 李洋 on 2023/8/19.
//
class Q2235 {
public:
int sum(int num1, int num2) {
while (num2) {
unsigned int carry = (unsigned int) (num1 & num2) << 1;
num1 ^= num2;
num2 = carry;
}
return num1;
}
};

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//
// Created by 李洋 on 2023/8/12.
//
#include "../../dataStruct/LinkedList/lists.h"
using namespace std;
class Q23 {
public:
bool compare(const ListNode *a, const ListNode *b) {
return a->val < b->val;
}
ListNode* mergeKLists(vector<ListNode*>& lists) {
}
};

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//
// Created by 李洋 on 2023/8/16.
//
#include "vector"
using namespace std;
class Q2682 {
public:
vector<int> circularGameLosers(int n, int k) {
vector<bool> visit(n, false);
for (int i = k, j = 0; !visit[j]; i += k) {
visit[j] = true;
j = (j + i) % n;
}
vector<int> ans;
for (int i = 0; i < n; i++) {
if (!visit[i]) {
ans.emplace_back(i + 1);
}
}
return ans;
}
};

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//
// Created by 李洋 on 2023/8/14.
//
#include "../../dataStruct/Tree/Tree.h"
class Q617 {
public:
TreeNode* mergeTrees(TreeNode* root1, TreeNode* root2) {
if (root1 == nullptr) {
return root2;
}
if (root2 == nullptr) {
return root1;
}
auto merged = new TreeNode(root1->val + root2->val);
merged->left = mergeTrees(root1->left, root2->left);
merged->right = mergeTrees(root1->right, root2->right);
return merged;
}
};

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//
// Created by 李洋 on 2023/8/13.
//
#include <vector>
using namespace std;
class Q88 {
public:
void merge(vector<int>& nums1, int m, vector<int>& nums2, int n) {
int p1 = 0, p2 = 0;
int sorted[m + n];
int cur;
while (p1 < m || p2 < n) {
if (p1 == m) {
cur = nums2[p2++];
} else if (p2 == n) {
cur = nums1[p1++];
} else if (nums1[p1] < nums2[p2]) {
cur = nums1[p1++];
} else {
cur = nums2[p2++];
}
sorted[p1 + p2 - 1] = cur;
}
for (int i = 0; i != m + n; ++i) {
nums1[i] = sorted[i];
}
}
};

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//
// Created by 李洋 on 2023/9/7.
//
#ifndef LEECODE_C_2594_H
#define LEECODE_C_2594_H
#include <vector>
using namespace std;
long long repairCars(vector<int> &ranks, int cars) {
}
#endif //LEECODE_C_2594_H

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//
// Created by 李洋 on 2023/9/6.
//
#ifndef LEECODE_C_Q1123_H
#define LEECODE_C_Q1123_H
#pragma once
#include "../../dataStruct/Tree/TreeStack.h"
std::pair<TreeNode *, int> f(TreeNode *root) {
if (!root) {
return {root, 0};
}
auto left = f(root->left);
auto right = f(root->right);
if (left.second > right.second) {
return {left.first, left.second + 1};
}
if (left.second < right.second) {
return {right.first, right.second + 1};
}
return {root, left.second + 1};
}
struct TreeNode *lcaDeepestLeaves(struct TreeNode *root) {
return f(root).first;
}
#endif //LEECODE_C_Q1123_H

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//
// Created by 李洋 on 2023/9/1.
//
#ifndef LEECODE_C_2240_H
#define LEECODE_C_2240_H
class Q2240 {
public:
long long waysToBuyPensPencils(int total, int cost1, int cost2) {
long long count = total / cost2 + 1;
int tos = total / cost1;
for (int i = 1; i <= tos; ++i) {
int temp = total - i * cost1;
count += temp / cost2 + 1;
}
return count;
}
};
#endif //LEECODE_C_2240_H

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//
// Created by 李洋 on 2023/10/26.
//
#ifndef LEECODE_C_2520_H
#define LEECODE_C_2520_H
#include <string>
using namespace std;
class Q2520 {
public:
int countDigits(int num) {
string str = to_string(num);
int res = 0;
for (auto &ch: str) {
if (num % (ch - '0') == 0) {
res++;
}
}
return res;
}
};
#endif //LEECODE_C_2520_H

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//
// Created by 李洋 on 2023/10/7.
//
#ifndef LEECODE_C_Q901_H
#define LEECODE_C_Q901_H
#include <stack>
using namespace std;
class trendSpanner {
public:
trendSpanner() {}
int next(int price) {
count = 1;
if (trend.size() == 0 || price < trend.top()->value) {
trend.push(new stock{price, 1});
return count;
}
while (!trend.empty() && price >= trend.top()->value) {
count += trend.top()->value;
stock *temp = trend.top();
trend.pop();
delete (temp);
}
trend.push(new stock{price, count});
return count;
}
private:
struct stock {
int key;
int value;
};
stack<stock *> trend;
int count;
};
/**
* Your trendSpanner object will be instantiated and called as such:
* trendSpanner* obj = new trendSpanner();
* int param_1 = obj->next(price);
*/
#endif LEECODE_C_Q901_H

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#ifndef LEECODE_C_Q1346_H
#define LEECODE_C_Q1346_H
#include <map>
using namespace std;
class Q1346 {
public:
bool checkIfExist(vector<int>& arr) {
unordered_map<int,int> m;
for(auto i:arr){
m[i] = 1;
}
for(auto [key,value]:m){
if (m[key*2] == 1)
{
return true;
}
}
return false;
}
};
#endif LEECODE_C_Q1346_H

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//
// Created by 李洋 on 2023/10/14.
//
#ifndef LEECODE_C_Q136_H
#define LEECODE_C_Q136_H
#include <vector>
using namespace std;
class Q136 {
public:
int singleNumber(vector<int> &nums) {
int count = 0;
for (int i: nums) {
count ^= i;
}
return count;
}
};
#endif //LEECODE_C_Q136_H

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//
// Created by 李洋 on 2023/10/16.
//
#ifndef LEECODE_C_Q137_H
#define LEECODE_C_Q137_H
#include <vector>
#include <map>
using namespace std;
class Q137 {
public:
int singleNumber(vector<int> &nums) {
unordered_map<int, int> m;
for (int i: nums) {
m[i] = m[i] + 1;
}
for (auto [num, count]: m) {
if (count == 1) {
return num;
}
}
return -1;
}
};
#endif //LEECODE_C_Q137_H

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//
// Created by 李洋 on 2023/10/27.
//
#ifndef LEECODE_C_Q1465_H
#define LEECODE_C_Q1465_H
#include <vector>
using namespace std;
class Q1465 {
public:
int maxArea(int h, int w, vector<int> &horizontalCuts, vector<int> &verticalCuts) {
int maxHorizon;
int maxVertical;
if (horizontalCuts.size()) {
maxHorizon = max(horizontalCuts[0], h - horizontalCuts[horizontalCuts.size() - 1]);
} else {
maxHorizon = h;
}
if (verticalCuts.size()) {
maxVertical = max(verticalCuts[0], w - verticalCuts[verticalCuts.size() - 1]);
} else {
maxVertical = w;
}
for (int i = 1; i < horizontalCuts.size(); ++i) {
maxHorizon = max(maxHorizon, horizontalCuts[i] - horizontalCuts[i - 1]);
}
for (int i = 1; i < verticalCuts.size(); ++i) {
maxVertical = max(maxVertical, verticalCuts[i] - verticalCuts[i - 1]);
}
return (long long) maxHorizon * maxVertical % 1000000001;
}
};
#endif //LEECODE_C_Q1465_H

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//
// Created by 李洋 on 2023/10/13.
//
#ifndef LEECODE_C_Q1488_H
#define LEECODE_C_Q1488_H
#include <vector>
#include <map>
using namespace std;
class Q1488 {
public:
vector<int> avoidFlood(vector<int> &rains) {
map<int, int> m;
vector<int> ret;
for (int i = 0; i < rains.size(); i++) {
if (rains[i] == 0) {
for (int j = i + 1; j < rains.size(); ++j) {
if (j > 0) {
if (m[rains[j]] == 1) {
m.erase(rains[j]);
ret.push_back(rains[j]);
break;
}
}
if (j == rains.size() - 1) {
ret.push_back(1);
}
}
continue;
}
if (m[rains[i]]) {
return vector<int>();
}
m[rains[i]] = 1;
ret.push_back(-1);
}
return ret;
}
};
#endif //LEECODE_C_Q1488_H

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//
// Created by 李洋 on 2023/10/19.
//
#ifndef LEECODE_C_Q1726_H
#define LEECODE_C_Q1726_H
#include <vector>
#include <map>
#include <../../dataStruct/Combination.h>
using namespace std;
int tupleSameProduct(vector<int> &nums) {
int count = 0;
unordered_map<int, int> m;
for (int i = 0; i < nums.size(); ++i) {
for (int j = i + 1; j < nums.size(); ++j) {
m[nums[i] * nums[j]] = m[nums[i] * nums[j]] + 1;
}
}
for (auto &pair: m) {
if (pair.second > 1) {
count += pair.second * (pair.second - 1) * 4;
}
}
return count;
}
int tupleSameProduct2(vector<int> &nums) {
int count = 0;
vector<int> result;
for (int i = 0; i < nums.size(); ++i) {
for (int j = i + 1; j < nums.size(); ++j) {
result.push_back(nums[i] * nums[j]);
}
}
sort(result.begin(), result.end());
int temp = 0;
int num = nums[0];
for (int i = 1; i < result.size(); ++i) {
if (result[i] == num) {
count += (temp++) * 8;
} else {
num = result[i];
temp = 0;
}
if (result[i] == result[i - 1]) {
count += 8;
}
}
return count;
}
int tupleSameProduct3(vector<int> &nums) {
int count = 0;
vector<int> result;
for (int i = 0; i < nums.size(); ++i) {
for (int j = i + 1; j < nums.size(); ++j) {
result.push_back(nums[i] * nums[j]);
}
}
sort(result.begin(), result.end());
int temp = 1;
int num = nums[0];
for (int i = 1; i < result.size(); ++i) {
if (result[i] == num) {
temp++;
} else {
count += temp * (temp - 1) * 4;
num = result[i];
temp = 1;
}
}
return count;
}
#endif //LEECODE_C_Q1726_H

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//
// Created by 李洋 on 2023/10/20.
//
#ifndef LEECODE_C_Q2525_H
#define LEECODE_C_Q2525_H
#include <string>
using namespace std;
class Q2525 {
public:
string categorizeBox(int length, int width, int height, int mass) {
if (length >= 10000 || width >= 10000 || height >= 10000 || (long long)length * width * height >= 1000000000) {
if (mass >= 100) {
return "Both";
} else {
return "Bulky";
}
}
if (mass >= 100) {
return "Heavy";
}
return "Neither";
}
};
#endif //LEECODE_C_Q2525_H

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//
// Created by 李洋 on 2023/10/12.
//
#ifndef LEECODE_C_Q2526_H
#define LEECODE_C_Q2526_H
#include <vector>
using namespace std;
class Q2526 {
public:
long long findTheArrayConcVal(vector<int> &nums) {
long long ans = 0;
for (int i = 0, j = nums.size() - 1; i <= j; i++, j--) {
if (i != j) {
int temp = nums[j];
int digit = 0;
while (temp != 0) {
digit++;
temp /= 10;
}
ans += nums[j] + (long long) nums[i] * pow(10, digit);
} else {
ans += nums[i];
}
}
return ans;
}
};
#endif //LEECODE_C_Q2526_H

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//
// Created by 李洋 on 2023/10/18.
//
#ifndef LEECODE_C_Q2530_H
#define LEECODE_C_Q2530_H
#include <vector>
#include <queue>
using namespace std;
long long maxKelements(vector<int> &nums, int k) {
long long count = 0;
priority_queue<int> Q(nums.begin(), nums.end());
while (k) {
auto top = Q.top();
Q.pop();
count += top;
Q.push(ceil(top / 3.0));
k--;
}
return count;
}
#endif //LEECODE_C_Q2530_H

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//
// Created by 李洋 on 2023/10/16.
//
#ifndef LEECODE_C_Q260_H
#define LEECODE_C_Q260_H
#include <vector>
#include <map>
using namespace std;
class Q260 {
public:
vector<int> singleNumber(vector<int> &nums) {
unordered_map<int, int> m;
for (int i: nums) {
m[i] = m[i] + 1;
}
vector<int> ret;
for (auto [num, count]: m) {
if (count == 1) {
if (ret.empty()) {
ret.push_back(num);
} else {
ret.push_back(num);
return ret;
}
}
}
return ret;
}
};
#endif //LEECODE_C_Q260_H

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//
// Created by 李洋 on 2023/10/17.
//
#ifndef LEECODE_C_Q2652_H
#define LEECODE_C_Q2652_H
class Q2652 {
public:
int f(int n, int m) {
return (m + n / m * m) * (n / m) / 2;
}
int sumOfMultiples(int n) {
return f(n, 3) + f(n, 5) + f(n, 7) - f(n, 3 * 5) - f(n, 3 * 7) - f(n, 5 * 7) + f(n, 3 * 5 * 7);
}
};
#endif //LEECODE_C_Q2652_H

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//
// Created by 李洋 on 2023/10/25.
//
#ifndef LEECODE_C_Q2698_H
#define LEECODE_C_Q2698_H
#include <vector>
using namespace std;
class Q2698 {
public:
int punishmentNumber(int n) {
auto all = vector<int>(
{1, 9, 10, 36, 45, 55, 82, 91, 99, 100, 235, 297, 369, 370, 379, 414, 657, 675, 703, 756, 792, 909, 918,
945, 964, 990, 991, 999, 1000});
int count = 0;
for (int i = 0; i < all.size() && all[i] <= n; ++i) {
count += all[i] * all[i];
}
return count;
}
};
#endif //LEECODE_C_Q2698_H

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//
// Created by 李洋 on 2023/10/29.
//
#ifndef LEECODE_C_Q274_H
#define LEECODE_C_Q274_H
#include <vector>
using namespace std;
class Q274 {
public:
int hIndex(vector<int> &citations) {
sort(citations.begin(), citations.end(), [](int a, int b) {
return a > b;
});
for (int i = 1; i < citations.size(); ++i) {
if (citations[i - 1] < i) {
return i - 1;
}
if (i + 1 == citations.size() - 1) {
return i + 1;
}
}
return citations[0] == 0 ? 0 : 1;
}
};
#endif //LEECODE_C_Q274_H

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//
// Created by 李洋 on 2023/10/30.
//
#ifndef LEECODE_C_Q275_H
#define LEECODE_C_Q275_H
#include <vector>
using namespace std;
class Q275 {
public:
int hIndex(vector<int> &citations) {
int n = citations.size();
int left = 0, right = n - 1;
while (left <= right) {
int mid = left + (right - left) / 2;
if (citations[mid] >= n - mid) {
right = mid - 1;
} else {
left = mid + 1;
}
}
return n - left;
}
};
#endif //LEECODE_C_Q275_H

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//
// Created by 李洋 on 2023/10/22.
//
#ifndef LEECODE_C_T368_H
#define LEECODE_C_T368_H
#include <vector>
using namespace std;
int minimumSum(vector<int> &nums) {
int left = 0;
int right = nums.size() - 1;
for (int i = 0; i < right; ++i) {
if (nums[left] >= nums[i]) {
left = i;
}
}
for (int i = right; i > left; --i) {
if (nums[right] >= nums[i]) {
right = i;
}
}
if (right - left == 1) {
return -1;
}
int max = left + 1;
for (int i = left + 1; i < right; ++i) {
if (nums[max] >= nums[i]) {
max = i;
}
}
return nums[left] + nums[right] + nums[max];
}
void runT368() {
vector<int> arr; // [5,4,8,7,10,2] / [6,5,4,3,4,5]
/* arr.push_back(5);
arr.push_back(4);
arr.push_back(8);
arr.push_back(7);
arr.push_back(10);
arr.push_back(2);*/
// arr.push_back(6);
// arr.push_back(5);
// arr.push_back(4);
// arr.push_back(3);
// arr.push_back(4);
// arr.push_back(5);
arr.push_back(50);
arr.push_back(50);
arr.push_back(50);
auto result = minimumSum(arr);
}
#endif //LEECODE_C_T368_H

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//
// Created by 李洋 on 2023/11/3.
//
#ifndef LEECODE_C_Q117_H
#define LEECODE_C_Q117_H
#include <stack>
#include <queue>
using namespace std;
class Node {
public:
int val;
Node *left;
Node *right;
Node *next;
Node() : val(0), left(nullptr), right(nullptr), next(nullptr) {}
Node(int _val) : val(_val), left(nullptr), right(nullptr), next(nullptr) {}
Node(int _val, Node *_left, Node *_right, Node *_next)
: val(_val), left(_left), right(_right), next(_next) {}
};
Node *connect(Node *root) {
if (!root) {
return nullptr;
}
queue<pair<Node *, int>> Q;
Q.emplace(root, 1);
while (!Q.empty()) {
auto temp = Q.front();
Q.pop();
if (temp.second == Q.front().second) {
temp.first->next = Q.front().first;
}
if (temp.first->left != nullptr) {
Q.emplace(temp.first->left, temp.second + 1);
}
if (temp.first->right != nullptr) {
Q.emplace(temp.first->right, temp.second + 1);
}
}
return root;
}
#endif //LEECODE_C_Q117_H

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//
// Created by 李洋 on 2023/11/5.
//
#ifndef LEECODE_C_Q187_H
#define LEECODE_C_Q187_H
#include <string>
#include <vector>
#include <unordered_map>
using namespace std;
vector<string> findRepeatedDnaSequences(string s) {
vector<string> ret;
unordered_map<string, int> m;
for(int i = 0;i+9<s.length();i++){
m[s.substr(i,i+9)] = m[s.substr(i,i+9)] + 1;
}
for(auto [key,value]:m){
if(value > 1){
ret.push_back(key);
}
}
return ret;
}
#endif //LEECODE_C_Q187_H

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#ifndef LEECODE_C_Q2342_H
#define LEECODE_C_Q2342_H
#include <vector>
#include <map>
using namespace std;
int maximumSum(vector<int> &nums)
{
int ans = -1;
int mx[82]{}; // 至多 9 个 9 相加
for (int num : nums)
{
int s = 0; // num 的数位和
for (int x = num; x; x /= 10)
{ // 枚举 num 的每个数位
s += x % 10;
}
if (mx[s])
{ // 说明左边也有数位和等于 s 的元素
ans = max(ans, mx[s] + num); // 更新答案的最大值
}
mx[s] = max(mx[s], num); // 维护数位和等于 s 的最大元素
}
return ans;
}
#endif LEECODE_C_Q2342_H

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//
// Created by 李洋 on 2023/11/8.
//
#ifndef LEECODE_C_Q2586_H
#define LEECODE_C_Q2586_H
#include <string>
#include <vector>
#include <unordered_map>
using namespace std;
int vowelStrings(vector<string> &words, int left, int right) {
unordered_map<char, int> m;
m['a'] = 1;
m['e'] = 1;
m['i'] = 1;
m['o'] = 1;
m['u'] = 1;
int count = 0;
for (int i = left; i <= right; ++i) {
auto s = words[i];
if (s != "" && m[s[0]] && m[s[s.length() - 1]]) {
count++;
}
}
return count;
}
#endif //LEECODE_C_Q2586_H

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//
// Created by 李洋 on 2023/11/8.
//
#ifndef LEECODE_C_Q2609_H
#define LEECODE_C_Q2609_H
#include <string>
#include <vector>
#include <stack>
using namespace std;
int findTheLongestBalancedSubstring(string s) {
int n = s.size(), idx = 0, ans = 0;
while (idx < n) {
int a = 0, b = 0;
while (idx < n && s[idx] == '0' && ++a >= 0) idx++;
while (idx < n && s[idx] == '1' && ++b >= 0) idx++;
ans = max(ans, min(a, b) * 2);
}
return ans;
}
#endif //LEECODE_C_Q2609_H

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//
// Created by 李洋 on 2023/11/6.
//
#ifndef LEECODE_C_Q318_H
#define LEECODE_C_Q318_H
#include <string>
#include <vector>
using namespace std;
int maxProduct(vector<string> &words) {
}
#endif //LEECODE_C_Q318_H

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//
// Created by 李洋 on 2023/11/7.
//
#ifndef LEECODE_C_Q876_H
#define LEECODE_C_Q876_H
#include <vector>
#include <stack>
using namespace std;
struct ListNode {
int val;
ListNode *next;
ListNode() : val(0), next(nullptr) {}
ListNode(int x) : val(x), next(nullptr) {}
ListNode(int x, ListNode *next) : val(x), next(next) {}
};
ListNode *middleNode(ListNode *head) {
ListNode *slow = head, *fast = head;
while (fast && fast->next) {
slow = slow->next;
fast = fast->next->next;
}
return slow;
}
#endif //LEECODE_C_Q876_H

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//
// Created by 李洋 on 2024/1/3.
//
#ifndef LEECODE_C_2497_H
#define LEECODE_C_2497_H
#include "../../dataStruct/LinkedList/lists.h"
#include <stack>
using namespace std;
//单调栈
ListNode *removeNodes(ListNode *head) {
stack<ListNode *> S;
S.push(head);
ListNode *temp = head->next;
while (temp) {
while (!S.empty() && temp->val > S.top()->val) {
S.pop();
}
S.push(temp);
temp = temp->next;
}
temp = S.top();
S.pop();
while (!S.empty()) {
S.top()->next = temp;
temp = S.top();
S.pop();
}
return temp;
}
#endif //LEECODE_C_2497_H

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//
// Created by 李洋 on 2024/1/22.
//
#ifndef LEECODE_C_670_H
#define LEECODE_C_670_H
#include <string>
using namespace std;
int maximumSwap(int num) {
string charArray = to_string(num);
int n = charArray.size();
int maxIdx = n - 1;
int idx1 = -1, idx2 = -1;
for (int i = n - 1; i >= 0; i--) {
if (charArray[i] > charArray[maxIdx]) {
maxIdx = i;
} else if (charArray[i] < charArray[maxIdx]) {
idx1 = i;
idx2 = maxIdx;
}
}
if (idx1 >= 0) {
swap(charArray[idx1], charArray[idx2]);
return stoi(charArray);
} else {
return num;
}
}
#endif //LEECODE_C_670_H

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//
// Created by 李洋 on 2024/1/15.
//
#ifndef LEECODE_C_82_H
#define LEECODE_C_82_H
// 本题与83题中要求删除重复多余的节点不同，要求只要重复就删除掉所有重复的节点，关机在于链表头的处理
// 这里采用的是创建一个新的头节点，然后对后续节点进行继续处理，一次遍历即可
struct ListNode {
int val;
ListNode *next;
ListNode() : val(0), next(nullptr) {}
ListNode(int x) : val(x), next(nullptr) {}
ListNode(int x, ListNode *next) : val(x), next(next) {}
};
ListNode *deleteDuplicates(ListNode *head) {
if (!head) {
return head;
}
ListNode* dummy = new ListNode(0, head);
ListNode* cur = dummy;
while (cur->next && cur->next->next) {
if (cur->next->val == cur->next->next->val) {
int x = cur->next->val;
while (cur->next && cur->next->val == x) {
cur->next = cur->next->next;
}
}
else {
cur = cur->next;
}
}
return dummy->next;
}
#endif //LEECODE_C_82_H

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//
// Created by 李洋 on 2024/2/25.
//
#ifndef LEETCODE_C_235_H
#define LEETCODE_C_235_H
struct TreeNode {
int val;
struct TreeNode *left;
struct TreeNode *right;
};
struct TreeNode* lowestCommonAncestor(struct TreeNode* root, struct TreeNode* p, struct TreeNode* q) {
}
#endif //LEETCODE_C_235_H

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//
// Created by 李洋 on 2024/2/17.
//
#ifndef LEETCODE_C_429_H
#define LEETCODE_C_429_H
#include "stdlib.h"
struct Node {
int val;
int numChildren;
struct Node **children;
};
struct linkedNode {
int val;
struct linkedNode *next;
};
struct queue {
struct linkedNode *head;
struct linkedNode *tail;
int size;
};
void push(struct queue Q, int val) {
struct linkedNode *temp = (struct linkedNode *) malloc(sizeof(struct linkedNode));
Q.size++;
if (Q.size == 0) {
temp->val = val;
Q.head = temp;
Q.tail = temp;
return;
}
Q.tail->next = temp;
Q.tail = temp;
}
int pop(struct queue Q) {
int top = Q.head->val;
struct linkedNode *temp = Q.head;
Q.head = temp->next;
free(temp);
Q.size--;
return top;
}
int top(struct queue Q) {
return Q.head->val;
}
int **levelOrder(struct Node *root, int *returnSize, int **returnColumnSizes) {
int ** ans = (int **)malloc(sizeof(int *) * 1000);
*returnColumnSizes = (int *)malloc(sizeof(int) * 1000);
if (!root) {
*returnSize = 0;
return ans;
}
struct Node ** queue = (struct Node **)malloc(sizeof(struct Node *) * 10000);
int head = 0, tail = 0;
int level = 0;
queue[tail++] = root;
while (head != tail) {
int cnt = tail - head;
ans[level] = (int *)malloc(sizeof(int) * cnt);
for (int i = 0; i < cnt; ++i) {
struct Node * cur = queue[head++];
ans[level][i] = cur->val;
for (int j = 0; j < cur->numChildren; j++) {
queue[tail++] = cur->children[j];
}
}
(*returnColumnSizes)[level++] = cnt;
}
*returnSize = level;
free(queue);
return ans;
}
#endif //LEETCODE_C_429_H

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//
// Created by 李洋 on 2024/2/19.
//
#ifndef LEETCODE_C_590_H
#define LEETCODE_C_590_H
#include <stdlib.h>
struct Node {
int val;
int numChildren;
struct Node **children;
};
/**
* Note: The returned array must be malloced, assume caller calls free().
*/
#define MAX_NODE_SIZE 10000
void helper(const struct Node* root, int* res, int* pos) {
if (NULL == root) {
return;
}
for (int i = 0; i < root->numChildren; i++) {
helper(root->children[i], res, pos);
}
res[(*pos)++] = root->val;
}
int* postorder(struct Node* root, int* returnSize) {
int * res = (int *)malloc(sizeof(int) * MAX_NODE_SIZE);
int pos = 0;
helper(root, res, &pos);
*returnSize = pos;
return res;
}
#endif //LEETCODE_C_590_H

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//
// Created by 李洋 on 2024/3/26.
//
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
int min(int a, int b)
{
return a > b ? b : a;
}
int coinChange(int *coins, int coinsSize, int amount)
{
int *dp = (int *)calloc((amount + 1), sizeof(int));
for (int i = 0; i <= amount; i++)
{
dp[i] = amount + 1;
}
dp[0] = 0;
for (int i = 1; i <= amount; ++i)
{
for (int j = 0; j < coinsSize; ++j)
{
if (coins[j] <= i)
{
dp[i] = min(dp[i], dp[i - coins[j]] + 1);
}
}
}
return dp[amount] > amount ? -1 : dp[amount];
}
void run()
{
int a1[3] = {1, 2, 5};
int a2[4] = {3, 7, 405, 436};
int a3[1] = {2};
coinChange(a3, 1, 3);
}

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//
// Created by 李洋 on 2024/3/26.
//
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
int coinChange(int *coins, int coinsSize, int amount)
{
int *dp = (int *)calloc((amount + 1), sizeof(int));
//memset(dp, 0, sizeof(dp));
dp[0] = 1;
for (int i = 0; i < coinsSize; i++) {
for (int j = coins[i]; j <= amount; j++) {
dp[j] += dp[j - coins[i]];
}
}
return dp[amount];
}
int main()
{
int a1[3] = {1, 2, 5};
int a2[4] = {3, 7, 405, 436};
int a3[1] = {2};
coinChange(a3, 1, 3);
}

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#include <stdio.h>
void swap(int* a, int* b) {
int temp = *a;
*a = *b;
*b = temp;
}
void QuickSort(int *arr, int low, int high)
{
}

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//
// Created by szh2 on 24-4-3.
//
#include <iostream>
using namespace std;
struct TreeNode {
int val;
TreeNode *left;
TreeNode *right;
TreeNode(int x) : val(x), left(NULL), right(NULL) {}
};
class Solution{
public:
TreeNode * getTargetCopy(TreeNode * original, TreeNode * cloned, TreeNode * target) {
if (original == nullptr) {
return nullptr;
}
if (original == target) {
return cloned;
}
TreeNode *left = getTargetCopy(original->left, cloned->left, target);
if (left != nullptr) {
return left;
}
return getTargetCopy(original->right, cloned->right, target);
}
};

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#include <vector>
#include <functional>
using namespace std;
class Solution {
public:
vector<vector<int>> getAncestors(int n, vector<vector<int>> &edges) {
vector<vector<int>> g(n);
for (auto &e : edges) {
g[e[1]].push_back(e[0]); // 反向建图
}
vector<vector<int>> ans(n);
vector<int> vis(n);
function<void(int)> dfs = [&](int x) {
vis[x] = true; // 避免重复访问
for (int y : g[x]) {
if (!vis[y]) {
dfs(y); // 只递归没有访问过的点
}
}
};
for (int i = 0; i < n; i++) {
ranges::fill(vis, false);
dfs(i); // 从 i 开始 DFS
vis[i] = false; // ans[i] 不含 i
for (int j = 0; j < n; j++) {
if (vis[j]) {
ans[i].push_back(j);
}
}
}
return ans;
}
};

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//
// Created by 李洋 on 2024/4/3.
//
#include <stdlib.h>
#include <string.h>
void reverse(char *s, int end) {
int i = 0;
while (i < end) {
char temp = s[i];
s[i] = s[end];
s[end] = temp;
i++;
end--;
}
}
char *finalString(char *s) {
int len = strlen(s);
char *r = malloc((len + 1) * sizeof(char));
int x = 0;
for (int i = 0; i < len; i++) {
if (i != 0 && s[i] == 'i') {
reverse(r, x - 1);
} else {
r[x++] = s[i];
}
}
r[x] = '\0';
return r;
}

39
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//
// Created by 李洋 on 2024/6/23.
//
#ifndef LEETCODE_C_520_CPP
#define LEETCODE_C_520_CPP
#include <stdlib.h>
#include "ctype.h"
#include "stdbool.h"
#include "string.h"
char *toLowerCase(const char *str) {
char *result = (char *) malloc(sizeof(char) * strlen(str));
for (int i = 0; i < strlen(str); i++) {
result[i]= tolower(str[i]);
}
return result;
}
// 通过数值判断
bool detectCapitalUse(char *word) {
char *lower = toLowerCase(word);
int count = 0;
for (int i = 0; i < strlen(word); ++i) {
count += lower[i] - word[i];
}
int interval = 'a' - 'A';
if ((count == interval && word[0] >= 'A' && word[0] <= 'Z') || count == interval * strlen(word) || count == 0) {
return true;
}
return false;
}
bool run() {
return detectCapitalUse("USA");
}
#endif //LEETCODE_C_520_CPP

30
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//
// Created by 李洋 on 2024/6/21.
//
#ifndef LEETCODE_C_LCP61_H
#define LEETCODE_C_LCP61_H
# include <math.h>
int getTemper(int *temperA, int i) {
if (temperA[i + 1] == temperA[i]) {
return 0;
}
return temperA[i + 1] < temperA[i] ? -1 : 1;
}
int temperatureTrend(int *temperatureA, int temperatureASize, int *temperatureB, int temperatureBSize) {
int ans = 0, count = 0;
for (int i = 0; i+1 < temperatureASize; ++i) {
int a = getTemper(temperatureA, i);
int b = getTemper(temperatureB, i);
if (a == b) {
count++;
ans = fmax(ans, count);
} else count = 0;
}
return ans;
}
#endif //LEETCODE_C_LCP61_H

22
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#include <vector>
using namespace std;
int countWays(vector<int> &nums) {
sort(nums.begin(), nums.end());
int count = 0;
for (int i = 0; i <= nums.size(); i++) {
if (i == 0) {
if (nums[0] != 0) {
count++;
}
continue;
}
if (i == nums.size() && i > nums[nums.size()]) {
count++;
continue;
}
if (i > nums[i - 1] && i < nums[i])count++;
}
return count;
}

13
24/09/70.h Normal file
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//
// Created by 李洋 on 2024/9/7.
//
#ifndef LEECODE_CPP_70_H
#define LEECODE_CPP_70_H
//爬楼梯
int climbStairs(int n) {
}
#endif //LEECODE_CPP_70_H

26
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int minChanges(int n, int k)
{
if(n<k){
return 1;
}
int count = 0;
while (n || k == 0)
{
if ((n & 1) < (k & 1))
{
return -1;
}
if ((n & 1) > (k & 1))
{
count++;
}
n >>= 1;
k >>= 1;
}
return count;
}
int minChanges1(int n, int k) {
return (n & k) == k ? __builtin_popcount(n ^ k) : -1;
}

27
24/11/3243.cpp Normal file
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#include <vector>
using namespace std;
vector<int> shortestDistanceAfterQueries(int n, vector<vector<int>> &queries)
{
vector<vector<int>> prev(n);
vector<int> dp(n);
for (int i = 1; i < n; i++)
{
prev[i].push_back(i - 1);
dp[i] = i;
}
vector<int> res;
for (auto &query : queries)
{
prev[query[1]].push_back(query[0]);
for (int v = query[1]; v < n; v++)
{
for (int u : prev[v])
{
dp[v] = min(dp[v], dp[u] + 1);
}
}
res.push_back(dp[n - 1]);
}
return res;
}

36
24/11/3258.cpp Normal file
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#include <string>
#include <iostream>
using namespace std;
int countKConstraintSubstrings(string s, int k)
{
int a, b;
int count = 0;
for (int i = 1; i <= s.length(); i++)
{
int j = 0;
while (j + i <= s.length())
{
a = 0;
b = 0;
for (int k = j; k < j + i; k++)
{
if (s[k] == '0')
{
a++;
}
else
{
b++;
}
}
if (a <= k || b <= k)
{
count++;
cout << j << " " << j + i << " " << a << " " << b << endl;
}
j++;
}
}
return count;
}

51
24/11/3259.cpp Normal file
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#include <vector>
#include <iostream>
#include "math.h"
using namespace std;
// 3259. 能量提升
// 动态规划+贪心 递推式：dp[i] += max(now[i-1], next[i-2])
long long maxEnergyBoost(vector<int> &energyDrinkA, vector<int> &energyDrinkB)
{
int n = energyDrinkA.size();
vector<vector<long long>> dp(n + 1, vector<long long>(2, 0));
dp[1][0] = energyDrinkA[0];
dp[1][1] = energyDrinkB[0];
for (int i = 2; i <= n; i++)
{
dp[i][0] = energyDrinkA[i - 1] + max(dp[i - 1][0], dp[i - 2][1]);
dp[i][1] = energyDrinkB[i - 1] + max(dp[i - 1][1], dp[i - 2][0]);
}
return max(dp[n][0], dp[n][1]);
}
long long maxEnergyBoost(int* energyDrinkA, int energyDrinkASize, int* energyDrinkB, int energyDrinkBSize) {
int n = energyDrinkASize;
long long **dp = (long long **)malloc(sizeof(long long *) * 2);
dp[0] = (long long *)malloc(sizeof(long long) * (n + 1));
dp[1] = (long long *)malloc(sizeof(long long) * (n + 1));
dp[0][0] = 0;
dp[1][0] = 0;
dp[0][1] = energyDrinkA[0];
dp[1][1] = energyDrinkB[0];
for (int i = 2; i <= n; i++)
{
dp[0][i] = energyDrinkA[i-1] + fmax(dp[0][i-1], dp[1][i-2]);
dp[1][i] = energyDrinkB[i-1] + fmax(dp[1][i-1], dp[0][i-2]);
}
return fmax(dp[0][n], dp[1][n]);
}
// 空间优化
long long maxEnergyBoost1(int* energyDrinkA, int energyDrinkASize, int* energyDrinkB, int energyDrinkBSize) {
int n = energyDrinkASize;
long long tmp[3]={energyDrinkA[0],energyDrinkB[0],energyDrinkA[0]};
for (int i = 1; i < energyDrinkASize; i++) {
tmp[0]=fmax(tmp[0]+energyDrinkA[i],tmp[1]);
tmp[1]=fmax(tmp[1]+energyDrinkB[i],tmp[2]);
tmp[2]=tmp[0];
}
return fmax(tmp[0],tmp[1]);
}

108
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#include <stdlib.h>
typedef struct ListNode
{
int val;
ListNode *next;
} ListNode;
// 若使用了带头节点的链表，则无需判断head是否为空
ListNode *createListNode(int val)
{
ListNode *node = (ListNode *)malloc(sizeof(ListNode));
node->val = val;
node->next = NULL;
return node;
}
void printList(ListNode *head)
{
ListNode *temp = head;
while(temp){
printf("%d ",temp->val);
temp = temp->next;
}
printf("\n");
}
// 添加节点
ListNode *addNode(ListNode *head,int val)
{
if(head == NULL){
head = createListNode(val);
return head;
}
ListNode *temp = head;
while(temp->next){
temp = temp->next;
}
ListNode *node = (ListNode *)malloc(sizeof(ListNode));
node->val = val;
node->next = NULL;
temp->next = node;
return head;
}
int Locate(ListNode *head,int val){
if(head == NULL){
return -1;
}
ListNode *temp = head;
int index = 0;
while(temp){
if(temp->val==val){
return index;
}
temp = temp->next;
index++;
}
return -1;
}
// 删除节点
ListNode *deleteNode(ListNode *head,int val){
if(head == NULL){
return NULL;
}
ListNode *temp1 = head;
if(temp1->val == val){
head = temp1->next;
free(temp1);
return head;
}
ListNode *temp2 = head->next;
while (temp2)
{
if(temp2->val == val){
temp1->next = temp2->next;
free(temp2);
return head;
}
temp1 = temp1->next;
temp2 = temp2->next;
}
return head;
}
ListNode *insertNode(ListNode *head,int val,int index){
if(head == NULL){
head = createListNode(val);
return head;
}
ListNode *temp = head;
int i = 0;
while(i < index-1 && temp){
temp = temp->next;
i++;
}
ListNode *node = (ListNode *)malloc(sizeof(ListNode));
node->val = val;
node->next = temp->next;
temp->next = node;
return head;
}

66
24/11/euclidean.c Normal file
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#include <stdio.h>
#include <stdlib.h>
#define MaxSize 100
struct stacks{
int data[MaxSize];
int top;
};
char *euclidean(int n, int r){
struct stacks s;
s.top = -1;
// 检查基数范围
if (r < 2 || r > 36) {
return NULL; // 无效的基数
}
// 处理 n 为 0 的情况
if (n == 0) {
char *result = (char *)malloc(2);
if (!result) return NULL; // 内存分配失败
result[0] = '0';
result[1] = '\0';
return result;
}
// 处理负数
int isNegative = 0;
if (n < 0) {
isNegative = 1;
n = -n;
}
while(n > 0){
if (s.top + 1 >= MaxSize) {
return NULL; // 栈溢出
}
s.data[++s.top] = n % r;
n = n / r;
}
// 计算需要的内存大小：字符数 + 可能的负号 + 终止符
int size = s.top + 1 + isNegative + 1;
char *result = (char *)malloc(sizeof(char) * size);
if (!result) {
return NULL; // 内存分配失败
}
int i = 0;
if (isNegative) {
result[i++] = '-';
}
while(s.top != -1){
int value = s.data[s.top--];
if (value < 10) {
result[i++] = '0' + value;
} else {
result[i++] = 'A' + (value - 10);
}
}
result[i] = '\0';
return result;
}

38
24/11/length.cpp Normal file
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@@ -0,0 +1,38 @@
#include "tree.c"
TreeNode* findLCA(TreeNode* root, int node1, int node2) {
if (root == NULL || root->val == node1 || root->val == node2) {
return root;
}
TreeNode* left = findLCA(root->left, node1, node2);
TreeNode* right = findLCA(root->right, node1, node2);
if (left != NULL && right != NULL) {
return root;
}
return (left != NULL) ? left : right;
}
int findLevel(TreeNode* root, int val, int level) {
if (root == NULL) return -1;
if (root->val == val) return level;
int left = findLevel(root->left, val, level + 1);
if (left != -1) return left;
return findLevel(root->right, val, level + 1);
}
int nodeDistance(TreeNode *root, int node1, int node2) {
TreeNode* lca = findLCA(root, node1, node2);
if (lca == NULL) return -1;
int d1 = findLevel(lca, node1, 0);
int d2 = findLevel(lca, node2, 0);
if (d1 == -1 || d2 == -1) return -1;
return d1 + d2;
}

219
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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
typedef struct TreeNode
{
int val;
struct TreeNode *left;
struct TreeNode *right;
} TreeNode;
typedef struct StackNode
{
TreeNode *treeNode;
struct StackNode *next;
} StackNode;
typedef struct Stack
{
StackNode *top;
} Stack;
void push(Stack *stack, TreeNode *treeNode)
{
StackNode *newNode = (StackNode *)malloc(sizeof(StackNode));
newNode->treeNode = treeNode;
newNode->next = stack->top;
stack->top = newNode;
}
TreeNode *pop(Stack *stack)
{
if (stack->top == NULL)
{
return NULL;
}
StackNode *temp = stack->top;
TreeNode *treeNode = temp->treeNode;
stack->top = stack->top->next;
free(temp);
return treeNode;
}
int isEmpty(Stack *stack)
{
return stack->top == NULL;
}
void preorder(TreeNode *root)
{
if (root == NULL)
{
return;
}
Stack stack = {NULL};
TreeNode *p = root;
while (p != NULL || !isEmpty(&stack))
{
while (p != NULL)
{
printf("%d ", p->val);
push(&stack, p);
p = p->left;
}
p = pop(&stack);
p = p->right;
}
}
void inorder(TreeNode *root)
{
if (root == NULL)
{
return;
}
Stack stack = {NULL};
TreeNode *p = root;
while (p != NULL || !isEmpty(&stack))
{
while (p != NULL)
{
push(&stack, p);
p = p->left;
}
p = pop(&stack);
printf("%d ", p->val);
p = p->right;
}
}
void postorder(TreeNode *root)
{
if (root == NULL)
{
return;
}
Stack stack = {NULL};
TreeNode *p = root;
TreeNode *pre = NULL;
do
{
while (p != NULL)
{
push(&stack, p);
p = p->left;
}
p = pop(&stack);
if (p->right == NULL || p->right == pre)
{
printf("%d ", p->val);
pre = p;
p = NULL;
}
else
{
push(&stack, p);
p = p->right;
}
} while (!isEmpty(&stack));
}
void Postorderd(TreeNode *root)
{
if (root == NULL)
{
return;
}
Postorderd(root->left);
Postorderd(root->right);
printf("%d ", root->val);
}
TreeNode* createTreeNode(int val) {
TreeNode* node = (TreeNode*)malloc(sizeof(TreeNode));
node->val = val;
node->left = NULL;
node->right = NULL;
return node;
}
TreeNode* generateCompleteBinaryTree(int nodeCount) {
if (nodeCount <= 0) {
return NULL;
}
srand(time(NULL));
TreeNode** nodes = (TreeNode**)malloc(nodeCount * sizeof(TreeNode*));
for (int i = 0; i < nodeCount; i++) {
nodes[i] = createTreeNode(rand() % 100 + 1);
}
for (int i = 0; i < nodeCount; i++) {
if (2 * i + 1 < nodeCount) {
nodes[i]->left = nodes[2 * i + 1];
}
if (2 * i + 2 < nodeCount) {
nodes[i]->right = nodes[2 * i + 2];
}
}
TreeNode* root = nodes[0];
free(nodes);
return root;
}
void printTreeStructure(TreeNode* root) {
if (root == NULL) {
return;
}
printf("%d ", root->val);
if (root->left != NULL || root->right != NULL) {
printf("(");
printTreeStructure(root->left);
printf(", ");
printTreeStructure(root->right);
printf(")");
}
}
/*
生成的二叉树结构如下：
2
/ \
/ \
4 7
/ \ / \
9 11 22 44
/ \ /
66 88 99
*/
TreeNode* generateSpecificBinaryTree()
{
int values[] = {2, 4, 7, 9, 11, 22, 44, 66, 88, 99};
int nodeCount = sizeof(values) / sizeof(values[0]);
TreeNode** nodes = (TreeNode**)malloc(nodeCount * sizeof(TreeNode*));
for (int i = 0; i < nodeCount; i++) {
nodes[i] = createTreeNode(values[i]);
}
for (int i = 0; i < nodeCount; i++) {
if (2 * i + 1 < nodeCount) {
nodes[i]->left = nodes[2 * i + 1];
}
if (2 * i + 2 < nodeCount) {
nodes[i]->right = nodes[2 * i + 2];
}
}
TreeNode* root = nodes[0];
free(nodes);
return root;
}

18
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#include <algorithm>
using namespace std;
int minMovesToCaptureTheQueen(int a, int b, int c, int d, int e, int f) {
// 车与皇后处在同一行，且中间没有象
if (a == e && (c != a || d <= min(b, f) || d >= max(b, f))) {
return 1;
}
// 车与皇后处在同一列，且中间没有象
if (b == f && (d != b || c <= min(a, e) || c >= max(a, e))) {
return 1;
}
// 象、皇后处在同一条对角线，且中间没有车
if (abs(c - e) == abs(d - f) && ((c - e) * (b - f) != (a - e) * (d - f)
|| a < min(c, e) || a > max(c, e))) {
return 1;
}
return 2;
}

40
25/05/2131.go Normal file
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package main
func Reverse(s string) string {
bytes := []byte(s) // 直接转为字节切片
for i, j := 0, len(bytes)-1; i < j; i, j = i+1, j-1 {
bytes[i], bytes[j] = bytes[j], bytes[i] // 交换字节
}
return string(bytes)
}
func longestPalindrome(words []string) int {
m := make(map[string]int)
res, center := 0, 0
for _, word := range words {
m[word]++
}
for word := range m {
if m[word] == 0 {
continue
}
reversed := Reverse(word)
if reversed == word {
pairs := m[word] / 2
res += pairs * 2 * 2
if m[word]%2 == 1 {
center = 2
}
} else {
if m[reversed] >= 1 {
pairs := min(m[word], m[reversed])
res += pairs * 4
m[word] -= pairs
m[reversed] -= pairs
}
}
}
return res + center
}

9
25/05/2894.go Normal file
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package main
func differenceOfSums(n int, m int) int {
nums2 := 0
for i := 0; i*m <= n; i++ {
nums2 += i * m
}
return n*(n+1)/2 - nums2*2
}

13
25/05/2942.go Normal file
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package main
import "strings"
func findWordsContaining(words []string, x byte) []int {
var result []int
for i, word := range words {
if strings.Index(word, string(x)) != -1 {
result = append(result, i)
}
}
return result
}

45
25/06/1061.go Normal file
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package main
type UnionFind struct {
parent []int
}
func NewUnionFind(n int) *UnionFind {
uf := &UnionFind{parent: make([]int, n)}
for i := 0; i < n; i++ {
uf.parent[i] = i
}
return uf
}
func (uf *UnionFind) Find(x int) int {
if uf.parent[x] != x {
uf.parent[x] = uf.Find(uf.parent[x])
}
return uf.parent[x]
}
func (uf *UnionFind) Unite(x, y int) {
x, y = uf.Find(x), uf.Find(y)
if x == y {
return
}
if x > y {
x, y = y, x
}
// 总是让字典序更小的作为集合代表字符
uf.parent[y] = x
}
func smallestEquivalentString(s1 string, s2 string, baseStr string) string {
uf := NewUnionFind(26)
for i := 0; i < len(s1); i++ {
uf.Unite(int(s1[i]-'a'), int(s2[i]-'a'))
}
res := []byte(baseStr)
for i := range res {
res[i] = byte('a' + uf.Find(int(res[i]-'a')))
}
return string(res)
}

38
25/06/1432.go Normal file
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@@ -0,0 +1,38 @@
package main
import (
"strconv"
"strings"
)
func maxDiff(num int) int {
replace := func(s string, x, y rune) string {
return strings.ReplaceAll(s, string(x), string(y))
}
num_max := strconv.Itoa(num)
num_min := num_max
for _, c := range num_max {
if c != '9' {
num_max = replace(num_max, c, '9')
break
}
}
for i, c := range num_min {
if i == 0 && c != '1' {
num_min = replace(num_min, c, '1')
break
}
if c != '0' && c != rune(num_min[0]) {
num_min = replace(num_min, c, '0')
break
}
}
x, _ := strconv.Atoi(num_max)
y, _ := strconv.Atoi(num_min)
return x - y
}

13
25/06/2929.go Normal file
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@@ -0,0 +1,13 @@
package main
func distributeCandies(n int, limit int) int64 {
var res int64 = 0
for i := 0; i <= min(n, limit); i++ {
last := n - i
if last > 2*limit {
continue
}
res += int64(min(last, limit) - max(0, last-limit) + 1)
}
return res
}

12
25/06/3423.go Normal file
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@@ -0,0 +1,12 @@
package main
import "math"
func maxAdjacentDistance(nums []int) int {
n := len(nums)
max := int(math.Abs(float64(nums[0] - nums[n-1])))
for i := 0; i < n-1; i++ {
max = int(math.Max(float64(max), float64(math.Abs(float64(nums[i]-nums[i+1])))))
}
return max
}

19
25/06/3442.go Normal file
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@@ -0,0 +1,19 @@
package main
func maxDifference(s string) int {
m := make(map[rune]int)
maxOdd := 0
minEven := len(s)
for _, c := range s {
m[c]++
}
for _, v := range m {
if v%2 == 1 {
maxOdd = max(maxOdd, v)
} else {
minEven = min(minEven, v)
}
}
return maxOdd - minEven
}

18
25/06/386.go Normal file
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@@ -0,0 +1,18 @@
package main
func lexicalOrder(n int) []int {
ans := make([]int, n)
num := 1
for i := 0; i < n; i++ {
ans[i] = num
if num*10 <= n {
num *= 10
} else {
for num%10 == 9 || num+1 > n {
num /= 10
}
num++
}
}
return ans
}

15
README.md Normal file
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@@ -0,0 +1,15 @@
- 02/2506
- ```c++
for (const string &word : words)
{
int state = 0;
for (char c : word)
{
state |= 1 << (c - 'a');
}
res += cnt[state];
cnt[state]++;
}
```
- 这是一种位压缩算法，巧妙的利用二进制的位来表示一个单词中出现的所有字母。
- 关键就是`state |= 1 << (c - 'a');`这一行。这一行的作用是将state的第(c - 'a')位设为1，这样就可以表示这个单词中出现了字母c。

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//
// Created by 李洋 on 2023/10/19.
//
#ifndef LEECODE_C_COMBINATION_H
#define LEECODE_C_COMBINATION_H
#include <iostream>
#include <vector>
// 计算组合数 C(n, m)
int calculateCnm(int n, int m) {
if (m < 0 || m > n) {
return 0;
}
if (m > n / 2) {
m = n - m; // 优化，使用较小的 m 提高效率
}
std::vector<std::vector<int>> dp(n + 1, std::vector<int>(m + 1, 0));
for (int i = 0; i <= n; i++) {
for (int j = 0; j <= std::min(i, m); j++) {
if (j == 0 || j == i) {
dp[i][j] = 1;
} else {
dp[i][j] = dp[i - 1][j - 1] + dp[i - 1][j];
}
}
}
return dp[n][m];
}
#endif //LEECODE_C_COMBINATION_H

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//
// Created by 李洋 on 2023/8/12.
//
#ifndef LEECODE_C_HEAP_H
#define LEECODE_C_HEAP_H
#include "vector"
template<typename T>
class Heap {
private:
std::vector<T> array;
public:
int length;
Heap(std::vector<T> &array) : array(array){
length = array.size();
}
typedef void (Heap::*compare(T a,T b))(bool);
};
#endif //LEECODE_C_HEAP_H

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//
// Created by 李洋 on 2023/8/6.
//
#ifndef LEECODE_C_LISTS_H
#define LEECODE_C_LISTS_H
#pragma once
#include <iostream>
#include <random>
struct ListNode {
int val;
ListNode *next;
ListNode() : val(0), next(nullptr) {}
ListNode(int x) : val(x), next(nullptr) {}
ListNode(int x, ListNode *next) : val(x), next(next) {}
void list() {
ListNode *temp = this;
while (temp) {
std::cout << temp->val << " ";
temp = temp->next;
}
std::cout << std::endl;
}
int *array() {
int *array = new int[len()];
ListNode *temp = this;
int index = 0;
while (temp) {
array[index++] = temp->val;
temp = temp->next;
}
return array;
}
int len() {
int length = 0;
ListNode *temp = this;
while (temp) {
temp = temp->next;
length++;
}
return length;
}
};
ListNode *createRandomList(int len) {
ListNode *p = nullptr;
std::random_device rd;
std::uniform_int_distribution<int> dis(1, 100);
std::mt19937 gen(rd());
while (--len >= 0) {
auto *temp = new ListNode(dis(gen), p);
p = temp;
}
return p;
}
#endif //LEECODE_C_LISTS_H

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#include <stdio.h>
#include <stdbool.h>
#define MAX_SIZE 100
typedef enum { INT_TYPE, FLOAT_TYPE, DOUBLE_TYPE } ElementType;
typedef struct {
ElementType type;
union {
int intValue;
float floatValue;
double doubleValue;
} data;
} Item;
typedef struct {
Item items[MAX_SIZE];
int size;
} PriorityQueue;
PriorityQueue createPriorityQueue() {
PriorityQueue pq;
pq.size = 0;
return pq;
}
bool isLess(Item item1, Item item2) {
if (item1.type != item2.type) {
fprintf(stderr, "错误：无法比较不同类型的元素。\n");
return false;
}
switch (item1.type) {
case INT_TYPE:
return item1.data.intValue < item2.data.intValue;
case FLOAT_TYPE:
return item1.data.floatValue < item2.data.floatValue;
case DOUBLE_TYPE:
return item1.data.doubleValue < item2.data.doubleValue;
default:
fprintf(stderr, "错误：未知的元素类型。\n");
return false;
}
}
void swap(Item* item1, Item* item2) {
Item temp = *item1;
*item1 = *item2;
*item2 = temp;
}
void push(PriorityQueue* pq, Item newItem) {
if (pq->size >= MAX_SIZE) {
fprintf(stderr, "错误：优先队列已满，无法插入元素。\n");
return;
}
int childIndex = pq->size;
pq->items[childIndex] = newItem;
pq->size++;
int parentIndex = (childIndex - 1) / 2;
while (childIndex > 0 && isLess(pq->items[childIndex], pq->items[parentIndex])) {
swap(&pq->items[childIndex], &pq->items[parentIndex]);
childIndex = parentIndex;
parentIndex = (childIndex - 1) / 2;
}
}
Item pop(PriorityQueue* pq) {
if (pq->size <= 0) {
fprintf(stderr, "错误：优先队列为空，无法弹出元素。\n");
Item emptyItem;
emptyItem.type = INT_TYPE; // 返回一个空元素
emptyItem.data.intValue = 0;
return emptyItem;
}
Item minItem = pq->items[0];
pq->size--;
pq->items[0] = pq->items[pq->size];
int parentIndex = 0;
while (true) {
int leftChildIndex = parentIndex * 2 + 1;
int rightChildIndex = parentIndex * 2 + 2;
int smallestIndex = parentIndex;
if (leftChildIndex < pq->size && isLess(pq->items[leftChildIndex], pq->items[smallestIndex])) {
smallestIndex = leftChildIndex;
}
if (rightChildIndex < pq->size && isLess(pq->items[rightChildIndex], pq->items[smallestIndex])) {
smallestIndex = rightChildIndex;
}
if (smallestIndex == parentIndex) {
break; // 已经是最小堆，无需继续下沉
}
swap(&pq->items[parentIndex], &pq->items[smallestIndex]);
parentIndex = smallestIndex;
}
return minItem;
}
int main() {
PriorityQueue pq = createPriorityQueue();
// 向优先队列中插入一些元素
Item item1, item2, item3;
item1.type = INT_TYPE;
item1.data.intValue = 5;
item2.type = INT_TYPE;
item2.data.intValue = 2;
item3.type = INT_TYPE;
item3.data.intValue = 10;
push(&pq, item1);
push(&pq, item2);
push(&pq, item3);
// 从优先队列中弹出元素
Item minItem = pop(&pq);
printf("弹出的最小元素为：%d\n", minItem.data.intValue);
return 0;
}

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# QUEUE
## PriorityQueue - 优先队列
- 优先队列也是一种队列，只不过不同的是，优先队列的出队顺序是按照优先级来的，可能需要找到元素集合中的最小或者最大元素，可以利用优先队列ADT来完成操作，优先队列ADT是一种数据结构，它支持插入和删除最小值操作（返回并删除最小元素）或删除最大值操作（返回并删除最大元素）；
- 这些操作等价于队列的`enQueue`和`deQueue`操作，区别在于，对于优先队列，元素进入队列的顺序可能与其被操作的顺序不同，作业调度是优先队列的一个应用实例，它根据优先级的高低而不是先到先服务的方式来进行调度；
- 如果最小键值元素拥有最高的优先级，那么这种优先队列叫作**升序优先队列**（即总是先删除最小的元素），类似的，如果最大键值元素拥有最高的优先级，那么这种优先队列叫作**降序优先队列**（即总是先删除最大的元素）；由于这两种类型时对称的，所以只需要关注其中一种，如升序优先队列；
- 优先队列的应用
- 数据压缩：赫夫曼编码算法；
- 最短路径算法：Dijkstra算法；
- 最小生成树算法：Prim算法；
- 事件驱动仿真：顾客排队算法；
- 选择问题：查找第k个最小元素；
- 等等等等....

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//
// Created by 李洋 on 2023/8/14.
//
#ifndef LEECODE_C_TREE_H
#define LEECODE_C_TREE_H
struct TreeNode {
int val;
TreeNode *left;
TreeNode *right;
TreeNode() : val(0), left(nullptr), right(nullptr) {}
TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {}
};
#include <iostream>
#include <random>
#include <queue>
TreeNode *creatRandomTree(int size) {
if (size == 0) {
return nullptr;
}
std::random_device rd;
std::mt19937 gen(rd());
std::uniform_int_distribution<int> dis(1, 100);
std::queue<int> Q;
std::queue<TreeNode *> T;
for (int i = size; i > 0; --i) {
Q.push(dis(gen));
std::cout << Q.back() << " ";
}
std::cout << std::endl;
TreeNode *head = new TreeNode(Q.front());
T.push(head);
Q.pop();
while (!Q.empty()) {
if (T.front()->left != nullptr && T.front()->right != nullptr) {
T.pop();
}
TreeNode *temp = new TreeNode(Q.front());
Q.pop();
if (T.front()->left == nullptr) {
T.front()->left = temp;
T.push(temp);
continue;
}
if (T.front()->right == nullptr) {
T.front()->right = temp;
T.push(temp);
}
}
return head;
}
#endif //LEECODE_C_TREE_H

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//
// Created by 李洋 on 2023/9/6.
//
#ifndef LEECODE_C_TREESTACK_H
#define LEECODE_C_TREESTACK_H
#pragma once
#include <iostream>
#include <vector>
#include "./Tree.h"
class TreeStack {
private:
std::vector<TreeNode *> data;
public:
// 入栈操作
void push(TreeNode *value) {
data.push_back(value);
}
// 出栈操作
TreeNode *pop() {
if (!isEmpty()) {
TreeNode *topValue = data.back();
data.pop_back();
return topValue;
} else {
std::cerr << "Error: Stack is empty." << std::endl;
return nullptr; // 可以根据需要返回其他值或抛出异常
}
}
// 获取栈顶元素
TreeNode *top() const {
if (!isEmpty()) {
return data.back();
} else {
std::cerr << "Error: Stack is empty." << std::endl;
return nullptr; // 可以根据需要返回其他值或抛出异常
}
}
// 检查栈是否为空
bool isEmpty() const {
return data.empty();
}
// 获取栈的大小
size_t size() const {
return data.size();
}
};
#endif //LEECODE_C_TREESTACK_H

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#include <string>
#include <vector>
using namespace std;
class Solution {
public:
vector<string> generateParenthesis(int n) {
vector<string> v;
dfs(v, "", n, n);
return v;
}
void dfs(vector<string> &v, string s, int lc, int rc){
if(lc == 0 && rc == 0){
v.push_back(s);
return;
}
if(lc != 0) dfs(v, s + '(', lc - 1, rc);
if(rc != 0 && rc - 1 >= lc){
dfs(v, s + ')', lc, rc - 1);
}
}
};

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//
// Created by 李洋 on 2023/10/2.
//
#ifndef LEECODE_C_DIVCONVERT_H
#define LEECODE_C_DIVCONVERT_H
#include <stack>
#include <string>
using namespace std;
string decimalToBinaryUsingEuclidean(int target) {
stack<int> s;
string result = "";
while (target) {
s.push(target % 2);
target /= 2;
}
while (!s.empty()) {
result.append(to_string(s.top()));
s.pop();
}
return result;
}
// test : cout << decimalToBinaryUsingEuclidean(555) << endl;
#endif //LEECODE_C_DIVCONVERT_H

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//
// Created by 李洋 on 2023/10/18.
//
#ifndef LEECODE_C_TEST_H_P
#define LEECODE_C_TEST_H_P
#include <queue>
#include <iostream>
using namespace std;
void testPQ() {
priority_queue<int, deque<int>, less<>> maxHeap;
maxHeap.push(1);
maxHeap.push(10);
maxHeap.push(3);
maxHeap.push(3);
maxHeap.push(3);
cout << maxHeap.top() << endl;
maxHeap.pop();
maxHeap.push(4);
cout << maxHeap.top() << endl;
maxHeap.pop();
maxHeap.push(2);
cout << maxHeap.top() << endl;
priority_queue<int, vector<int>, greater<>> minHeap;
minHeap.push(20);
minHeap.push(10);
minHeap.push(30);
cout << minHeap.top() << endl;
}
#endif //LEECODE_C_TEST_H_P

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# ELSE
-
- [X] [用栈实现辗转相除法](./DivConvert.h) - P59
-
- [X] [对称序列](./symmetry.h)
-
- [X] [括号匹配](./kuohao.h) - P63
-
- [ ] 二叉树计算
-
- [X] [二叉树代码 递归 + 非递归前中后序遍历](./traverse.h)
-
- [X] [快速排序](./sorts.h)
- [ ] [堆排序](./sorts.h)
-
- [X] [图](./structs/Graph.h)
- [X] [深度优先遍历](./structs/Graph.h)

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//
// Created by 李洋 on 2024/1/8.
//
#ifndef LEECODE_C_1_H
#define LEECODE_C_1_H
#include <iostream>
#include <vector>
#include <stdlib.h>
using namespace std;
void test1() {
//方式一
int a;
cout << "输入长度:";
cin >> a;
int *p = (int *) malloc(a * sizeof(int)); //c写法在运行中分配空间创建指定长度数组
p[a - 1] = 1;
cout << p[a-1] << endl;
//方式2 推荐
vector<int> b; //c++ 向量，可以看作是动态数组，自动扩充容量
vector<vector<int>> c; //二维动态数组
b.push_back(1);
b.push_back(2);
b.size(); //获取当前长度
}
#endif //LEECODE_C_1_H

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//
// Created by 李洋 on 2024/1/11.
//
#ifndef LEECODE_C_2_H
#define LEECODE_C_2_H
#include <iostream>
using namespace std;
void test1(int *p, int index) {
cout << p[index];
}
void run() {
int arr[3];
arr[0] = 1;
arr[1] = 2;
arr[2] = 3;
test1(arr, 2);
}
#endif //LEECODE_C_2_H

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//
// Created by 李洋 on 2023/10/4.
//
#ifndef LEECODE_C_KUOHAO_H
#define LEECODE_C_KUOHAO_H
#include <string>
#include <stack>
bool isKuoHao(std::string target) {
std::stack<char> tk;
for (int i = 0; i < target.length(); ++i) {
if (tk.empty()) {
tk.push(target[i]);
continue;
}
char temp;
switch (target[i]) {
case '{':
temp = '}';
break;
case '}':
temp = '{';
break;
case '[':
temp = ']';
break;
case ']':
temp = '[';
break;
case '(':
temp = ')';
break;
case ')':
temp = '(';
break;
default:
temp = 'x';
}
if (temp == tk.top()) {
tk.pop();
} else {
tk.push(target[i]);
}
}
return tk.empty();
}
// cout << isKuoHao("{}(({}))") << endl;
#endif //LEECODE_C_KUOHAO_H

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//
// Created by 李洋 on 2023/10/12.
//
#ifndef LEECODE_C_MAIN_H
#define LEECODE_C_MAIN_H
#include <iostream>
#include <queue>
#include "./structs/Tree.h"
#include "./traverse.h"
#include "./Heap/test.h"
#include "./sorts.h"
#include "./structs/Graph.h"
#include "./topic/2019.h"
#include <iostream>
using namespace std;
void run()
{
vector<int> arr({3, 2, 2, 4, 6, 2, 3});
odd_even(arr);
for (int i : arr)
{
cout << i << " ";
}
cout << endl;
}
#endif // LEECODE_C_MAIN_H

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//
// Created by 李洋 on 2023/10/19.
//
#ifndef LEECODE_C_SHELLSORT_H
#define LEECODE_C_SHELLSORT_H
#include <vector>
#include <random>
#include <iostream>
using namespace std;
void shellSort(vector<int> &arr) {
int n = arr.size();
// 选择增量序列，可以根据需要选择不同的序列
for (int gap = n / 2; gap > 0; gap /= 2) {
// 使用插入排序对每个子数组进行排序
for (int i = gap; i < n; ++i) {
int temp = arr[i];
int j = i;
while (j >= gap && arr[j - gap] > temp) {
arr[j] = arr[j - gap];
j -= gap;
}
arr[j] = temp;
}
}
}
// 快速排序 - start
int partition(vector<int> &arr,int left,int right){
int sign = arr[left];
while(left < right){
while(left < right && sign <= arr[right]){
right--;
}
swap(arr[left],arr[right]);
while(left < right && arr[left] <= sign){
left++;
}
swap(arr[left],arr[right]);
}
return left;
}
void splits(vector<int> &arr,int left,int right){
if (left < right)
{
int norm = partition(arr,left,right);
splits(arr,left,norm - 1);
splits(arr,norm + 1,right);
}
}
void quickSort(vector<int> &arr) {
splits(arr, 0, arr.size() - 1);
}
// 快速排序 - end
// 堆排序 - start small -> large
void maxHeapify(vector<int> &arr, int n, int i) {
int largest = i;
int left = i * 2 + 1;
int right = i * 2 + 2;
if (left < n && arr[left] > arr[largest]) {
largest = left;
}
if (right < n && arr[right] > arr[largest]) {
largest = right;
}
if (largest != i) {
swap(arr[i], arr[largest]);
maxHeapify(arr, n, largest);
}
}
void heapSort(vector<int> &arr) {
auto n = arr.size();
for (int i = n / 2 - 1; i >= 0; --i) {
maxHeapify(arr, n, i);
}
for (int i = n - 1; i > 0; i--) {
swap(arr[0], arr[i]);
maxHeapify(arr, i, 0);
}
}
// 堆排序 - end small -> large
// 归并排序
void merge(std::vector<int>& arr, int left, int middle, int right) {
int n1 = middle - left + 1;
int n2 = right - middle;
std::vector<int> leftArr(n1);
std::vector<int> rightArr(n2);
for (int i = 0; i < n1; i++) {
leftArr[i] = arr[left + i];
}
for (int i = 0; i < n2; i++) {
rightArr[i] = arr[middle + 1 + i];
}
int i = 0, j = 0, k = left;
while (i < n1 && j < n2) {
if (leftArr[i] <= rightArr[j]) {
arr[k] = leftArr[i];
i++;
} else {
arr[k] = rightArr[j];
j++;
}
k++;
}
while (i < n1) {
arr[k] = leftArr[i];
i++;
k++;
}
while (j < n2) {
arr[k] = rightArr[j];
j++;
k++;
}
}
void mergeSort(std::vector<int>& arr, int left, int right) {
if (left < right) {
int middle = left + (right - left) / 2;
mergeSort(arr, left, middle);
mergeSort(arr, middle + 1, right);
merge(arr, left, middle, right);
}
}
void runS() {
// std::random_device rd;
// std::mt19937 gen(rd());
// std::uniform_int_distribution<int> dis(1, 100);
vector<int> nums;
nums.reserve(10);
// for (int i = 0; i < 10; ++i) {
// nums.push_back(dis(gen));
// }
nums.push_back(11);
nums.push_back(6);
nums.push_back(9);
nums.push_back(23);
nums.push_back(6);
nums.push_back(11);
nums.push_back(26);
nums.push_back(40);
nums.push_back(8);
nums.push_back(95);
for (int i: nums) {
cout << i << " ";
}
cout << endl;
shellSort(nums);
for (int i: nums) {
cout << i << " ";
}
}
#endif //LEECODE_C_SHELLSORT_H

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//
// Created by 李洋 on 2023/10/21.
// 以邻接矩阵实现的INT图及其具体操作
//
#ifndef LEECODE_C_GRAPH_H
#define LEECODE_C_GRAPH_H
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <random>
#include <iostream>
#include <stack>
using namespace std;
class Graph {
public:
int size;
Graph(int n, bool direction) {
this->size = n;
G = vector<vector<int>>(size, vector<int>(size, 0));
visited = vector<int>(size, 0);
random_device rd;
mt19937 gen(rd());
uniform_int_distribution<int> dis(0, 1);
if (!direction) {
for (int i = 0; i < size; ++i) {
for (int j = i + 1; j < size; ++j) {
if (dis(gen)) {
G[i][j] = 1;
G[j][i] = 1;
}
}
}
} else {
for (int i = 0; i < size; ++i) {
for (int j = 0; j < size; ++j) {
if (i == j) {
continue;
}
if (dis(gen)) {
G[i][j] = 1;
}
}
}
}
}
// 0 1 0 0 0 0
// 1 0 1 1 0 0
// 0 1 0 0 0 1
// 0 1 0 0 0 0
// 0 0 0 0 0 1
// 0 0 1 0 1 0
Graph(int x) {
size = 6;
G = vector<vector<int>>(size, vector<int>(size, 0));
visited = vector<int>(size, 0);
vector<vector<int>> Edges;
if (x == 1) {
Edges.push_back({0, 1});
Edges.push_back({1, 2});
Edges.push_back({1, 3});
Edges.push_back({2, 5});
Edges.push_back({4, 5});
}
if (x == 2) {
}
for (auto Edge: Edges) {
G[Edge[0]][Edge[1]] = 1;
G[Edge[1]][Edge[0]] = 1;
}
}
Graph *GraphByEdge(vector<vector<int>> &Edges) {
for (auto Edge: Edges) {
vertex.insert(Edge[1]);
vertex.insert(Edge[2]);
}
size = vertex.size();
G = vector<vector<int>>(size, vector<int>(size, 0));
for (auto Edge: Edges) {
G[Edge[1]][Edge[2]] = 1;
}
return this;
}
void printG() {
for (int i = 0; i < size; ++i) {
for (int j = 0; j < size; ++j) {
cout << G[i][j] << " ";
}
cout << endl;
}
}
queue<int> DFS(int start) {
queue<int> Q;
stack<pair<int, int>> S;
Q.push(start);
S.emplace(start, -1);
visited[0] = 1;
while (!S.empty()) {
auto temp = S.top();
auto next = NextPoint(temp.first, temp.second);
S.top().second = next;
if (next == -1) {
S.pop();
continue;
}
if (visited[next]) {
continue;
}
Q.push(next);
visited[next] = 1;
S.emplace(next, -1);
}
if (Q.size() != size) {
// 将其他的点再进行DSF
}
return Q;
}
queue<int> BFS(int start) {
queue<int> Q;
queue<pair<int, int>> S;
Q.push(start);
S.emplace(start, -1);
visited[0] = 1;
while (!S.empty()) {
auto temp = S.front();
auto next = NextPoint(temp.first, temp.second);
S.front().second = next;
if (next == -1) {
S.pop();
continue;
}
if (visited[next]) {
continue;
}
Q.push(next);
visited[next] = 1;
S.emplace(next, -1);
}
if (Q.size() != size) {
// 将其他的点再进行BSF
}
return Q;
}
int NextPoint(int vex, int now) {
auto row = G[vex];
for (int i = now + 1; i < size; ++i) {
if (row[i] != 0) {
return i;
}
}
return -1;
}
private:
vector<vector<int>> G; // adjacent matrix
vector<int> visited;
set<int> vertex; // The collection of vertex
set<set<int>> ccp; // The graph has multiple connected components.
};
#endif //LEECODE_C_GRAPH_H

8
else/structs/List.h Normal file
View File

@@ -0,0 +1,8 @@
#ifndef List_h
#define List_h
struct ListNode{
int value;
struct ListNode * next;
}
#endif //List_h

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