diff --git "a/problems/0112.\350\267\257\345\276\204\346\200\273\345\222\214.md" "b/problems/0112.\350\267\257\345\276\204\346\200\273\345\222\214.md"
index b97013e67a..63ec043b53 100644
--- "a/problems/0112.\350\267\257\345\276\204\346\200\273\345\222\214.md"
+++ "b/problems/0112.\350\267\257\345\276\204\346\200\273\345\222\214.md"
@@ -133,17 +133,14 @@ private:
         if (!cur->left && !cur->right && count == 0) return true; // 遇到叶子节点，并且计数为0
         if (!cur->left && !cur->right) return false; // 遇到叶子节点直接返回
 
-        if (cur->left) { // 左
-            count -= cur->left->val; // 递归，处理节点;
-            if (traversal(cur->left, count)) return true;
-            count += cur->left->val; // 回溯，撤销处理结果
+        bool leftpath = false, rightpath = false;
+        if (node->left) {
+            leftpath = pathSum(node->left, count - node->left->val);
         }
-        if (cur->right) { // 右
-            count -= cur->right->val; // 递归，处理节点;
-            if (traversal(cur->right, count)) return true;
-            count += cur->right->val; // 回溯，撤销处理结果
+        if (node->right) {
+            rightpath = pathSum(node->right, count - node->right->val);
         }
-        return false;
+        return leftpath || rightpath;
     }
 
 public: