https://niweea.github.io/categories/%E7%AE%97%E6%B3%95/Recent content in 算法 on Niweea’s BlogHugoenSun, 07 Jun 2026 10:00:00 +0800https://niweea.github.io/posts/bit_operation/Fri, 04 Jun 2021 18:35:04 +0800https://niweea.github.io/posts/bit_operation/<p>位运算直接操作二进制位，在判断性质、压缩状态和优化性能时非常高效。下面整理几个实用技巧与对应 LeetCode 题目。</p> <h2 id="检测两个整数是否符号相反" class="relative group">检测两个整数是否符号相反 <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100"><a class="group-hover:text-primary-300 dark:group-hover:text-neutral-700" style="text-decoration-line: none !important;" href="#%e6%a3%80%e6%b5%8b%e4%b8%a4%e4%b8%aa%e6%95%b4%e6%95%b0%e6%98%af%e5%90%a6%e7%ac%a6%e5%8f%b7%e7%9b%b8%e5%8f%8d" aria-label="Anchor">#</a></span></h2><p><code>^</code>（异或）两值对应位不同时结果为 1。</p>