From a2630d663a1842d2b0baf51678565fed7919a438 Mon Sep 17 00:00:00 2001
From: ember <1279347317@qq.com>
Date: Sat, 6 Sep 2025 01:51:11 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E5=86=85=E5=AE=B9?=
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---
 content/post/算法题/位运算操作.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/content/post/算法题/位运算操作.md b/content/post/算法题/位运算操作.md
index 34efb29..600099a 100644
--- a/content/post/算法题/位运算操作.md
+++ b/content/post/算法题/位运算操作.md
@@ -27,7 +27,8 @@ math: true
 | `x & 1`                  | 判断奇偶性：真为奇，假为偶        |
 | `(n > 0) && ((n & (n - 1)) == 0)`            | 判断n是否为2的幂。因为2的幂的二进制只有一个1，用n & (n-1)可以直接把它唯一的1去掉变成0。
 | `n & ((1 << k) - 1)` | 等价于 `n % (1 << k)`，即`n`对$2^k$取模 |
-| `a ^= b; b ^= a; a ^= b` | 交换a和b的值 |
+| `a ^= b; b ^= a; a ^= b;` | 交换a和b的值 |
+| `~n` | 对n按位取反，结果为-n-1 |
 
 统计二进制数中1的个数：
 ```cpp