diff --git a/算法训练/刷题笔记/迭代一.md b/算法训练/刷题笔记/迭代一.md
index e67c061..10d87d9 100644
--- a/算法训练/刷题笔记/迭代一.md
+++ b/算法训练/刷题笔记/迭代一.md
@@ -16,6 +16,7 @@
 - [ ] [110. 平衡二叉树 - 力扣（LeetCode）](https://leetcode.cn/problems/balanced-binary-tree/solutions/377216/ping-heng-er-cha-shu-by-leetcode-solution/)
 - [ ] [106. 从中序与后序遍历序列构造二叉树 - 力扣（LeetCode）](https://leetcode.cn/problems/construct-binary-tree-from-inorder-and-postorder-traversal/)
 - [ ] [501. 二叉搜索树中的众数 - 力扣（LeetCode）](https://leetcode.cn/problems/find-mode-in-binary-search-tree/)
+- [ ] [450. 删除二叉搜索树中的节点 - 力扣（LeetCode）](https://leetcode.cn/problems/delete-node-in-a-bst/)