init

24/02/590.h

@@ -0,0 +1,41 @@
+//
+// 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