init

23/07/771.c

@@ -0,0 +1,55 @@
+#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;
+}