From 463f142f05d5759c8dfaa5f17dbebfa9ddf580f5 Mon Sep 17 00:00:00 2001
From: Steve2020 <841532108@qq.com>
Date: Mon, 31 Jan 2022 16:07:01 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=EF=BC=88559.n=E5=8F=89?=
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---
 problems/0104.二叉树的最大深度.md | 26 +++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/problems/0104.二叉树的最大深度.md b/problems/0104.二叉树的最大深度.md
index 6875ec74..3eecdc92 100644
--- a/problems/0104.二叉树的最大深度.md
+++ b/problems/0104.二叉树的最大深度.md
@@ -643,7 +643,33 @@ function maxDepth(root: TreeNode | null): number {
 };
 ```
 
+> N叉树的最大深度
 
+```typescript
+// 后续遍历（自下而上）
+function maxDepth(root: TreeNode | null): number {
+    if (root === null) return 0;
+    return Math.max(maxDepth(root.left), maxDepth(root.right)) + 1;
+};
+
+// 前序遍历(自上而下)
+function maxDepth(root: TreeNode | null): number {
+    function recur(node: TreeNode | null, count: number) {
+        if (node === null) {
+            resMax = resMax > count ? resMax : count;
+            return;
+        }
+        recur(node.left, count + 1);
+        recur(node.right, count + 1);
+    }
+    let resMax: number = 0;
+    let count: number = 0;
+    recur(root, count);
+    return resMax;
+};
+
+
+```
 
 ## C