From f2a1ad632f99c6f1a37ab4b88310e2c03f7a8c52 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=B2=89=E9=BB=98?=
 <71065161+chenmo1995@users.noreply.github.com>
Date: Thu, 30 Dec 2021 14:32:20 +0800
Subject: [PATCH] =?UTF-8?q?Update=200222.=E5=AE=8C=E5=85=A8=E4=BA=8C?=
 =?UTF-8?q?=E5=8F=89=E6=A0=91=E7=9A=84=E8=8A=82=E7=82=B9=E4=B8=AA=E6=95=B0?=
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---
 problems/0222.完全二叉树的节点个数.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/problems/0222.完全二叉树的节点个数.md b/problems/0222.完全二叉树的节点个数.md
index c5039039..754a6094 100644
--- a/problems/0222.完全二叉树的节点个数.md
+++ b/problems/0222.完全二叉树的节点个数.md
@@ -80,7 +80,7 @@ return treeNum;
 class Solution {
 private:
     int getNodesNum(TreeNode* cur) {
-        if (cur == 0) return 0;
+        if (cur == NULL) return 0;
         int leftNum = getNodesNum(cur->left);      // 左
         int rightNum = getNodesNum(cur->right);    // 右
         int treeNum = leftNum + rightNum + 1;      // 中