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krahets 2023-04-16 16:39:59 +08:00
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chapter_backtracking/backtracking_algorithm.md
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@ -290,6 +290,7 @@ comments: true
```cpp title="preorder_find_constrained_paths.cpp"
/* 前序遍历 */
void preOrder(TreeNode *root) {
// 剪枝
if (root == nullptr || root->val == 3) {
return;
}