{"id":567,"date":"2024-07-12T09:18:35","date_gmt":"2024-07-12T01:18:35","guid":{"rendered":"https:\/\/www.sxr666.cn\/?p=567"},"modified":"2024-07-12T09:28:47","modified_gmt":"2024-07-12T01:28:47","slug":"%e4%bd%8d%e8%bf%90%e7%ae%97","status":"publish","type":"post","link":"https:\/\/www.sxr666.cn\/index.php\/2024\/07\/12\/%e4%bd%8d%e8%bf%90%e7%ae%97\/","title":{"rendered":"\u4f4d\u8fd0\u7b97"},"content":{"rendered":"\n<p>\u4f4d\u8fd0\u7b97\u662f\u8ba1\u7b97\u673a\u79d1\u5b66\u4e2d\u5bf9\u4e8c\u8fdb\u5236\u6570\u8fdb\u884c\u64cd\u4f5c\u7684\u4e00\u79cd\u8fd0\u7b97\u65b9\u5f0f\uff0c\u4e3b\u8981\u5e94\u7528\u4e8e\u5e95\u5c42\u7f16\u7a0b\u548c\u786c\u4ef6\u8bbe\u8ba1\u4e2d\u3002\u4f4d\u8fd0\u7b97\u7b26\u5305\u62ec\u4ee5\u4e0b\u51e0\u79cd\uff1a<\/p>\n\n\n\n<ol>\n<li><strong>\u4f4d\u975e\uff08NOT\uff09<\/strong>\uff1a\u7b26\u53f7\u4e3a <code>~<\/code>\u3002\u5bf9\u4e00\u4e2a\u6570\u7684\u6bcf\u4e2a\u4f4d\u53d6\u53cd\uff0c\u53730\u53d8\u62101\uff0c1\u53d8\u62100\u3002<\/li>\n\n\n\n<li><strong>\u4f4d\u4e0e\uff08AND\uff09<\/strong>\uff1a\u7b26\u53f7\u4e3a <code>&amp;<\/code>\u3002\u4e24\u4e2a\u4f4d\u90fd\u4e3a1\u65f6\uff0c\u7ed3\u679c\u624d\u4e3a1\u3002<\/li>\n\n\n\n<li><strong>\u4f4d\u6216\uff08OR\uff09<\/strong>\uff1a\u7b26\u53f7\u4e3a <code>|<\/code>\u3002\u4e24\u4e2a\u4f4d\u4e2d\u81f3\u5c11\u6709\u4e00\u4e2a\u4e3a1\u65f6\uff0c\u7ed3\u679c\u5c31\u4e3a1\u3002<\/li>\n\n\n\n<li><strong>\u4f4d\u5f02\u6216\uff08XOR\uff09<\/strong>\uff1a\u7b26\u53f7\u4e3a <code>^<\/code>\u3002\u4e24\u4e2a\u4f4d\u76f8\u540c\u5219\u7ed3\u679c\u4e3a0\uff0c\u4e0d\u540c\u5219\u7ed3\u679c\u4e3a1\u3002<\/li>\n\n\n\n<li><strong>\u4f4d\u5de6\u79fb\uff08Left Shift\uff09<\/strong>\uff1a\u7b26\u53f7\u4e3a <code>&lt;&lt;<\/code>\u3002\u5c06\u4e00\u4e2a\u6570\u7684\u6240\u6709\u4f4d\u5411\u5de6\u79fb\u52a8\u6307\u5b9a\u7684\u4f4d\u6570\uff0c\u5de6\u8fb9\u8d85\u51fa\u7684\u4f4d\u4e22\u5f03\uff0c\u53f3\u8fb9\u7a7a\u51fa\u7684\u4f4d\u88650\u3002<\/li>\n\n\n\n<li><strong>\u4f4d\u53f3\u79fb\uff08Right Shift\uff09<\/strong>\uff1a\u7b26\u53f7\u4e3a <code>&gt;&gt;<\/code>\u3002\u5c06\u4e00\u4e2a\u6570\u7684\u6240\u6709\u4f4d\u5411\u53f3\u79fb\u52a8\u6307\u5b9a\u7684\u4f4d\u6570\uff0c\u53f3\u8fb9\u8d85\u51fa\u7684\u4f4d\u4e22\u5f03\uff0c\u5de6\u8fb9\u7a7a\u51fa\u7684\u4f4d\u8865\u539f\u6570\u7684\u6700\u9ad8\u4f4d\u7684\u503c\uff08\u5bf9\u4e8e\u65e0\u7b26\u53f7\u6570\u88650\uff0c\u5bf9\u4e8e\u6709\u7b26\u53f7\u6570\u8865\u6700\u9ad8\u4f4d\u7684\u503c\uff09\u3002<\/li>\n\n\n\n<li><strong>\u65e0\u7b26\u53f7\u53f3\u79fb\uff08Unsigned Right Shift\uff09<\/strong>\uff1a\u7b26\u53f7\u4e3a <code>&gt;&gt;&gt;<\/code>\uff08\u5728\u67d0\u4e9b\u8bed\u8a00\u4e2d\uff0c\u5982Java\uff09\u3002\u4e0e\u53f3\u79fb\u7c7b\u4f3c\uff0c\u4f46\u662f\u5de6\u8fb9\u7a7a\u51fa\u7684\u4f4d\u603b\u662f\u88650\uff0c\u65e0\u8bba\u539f\u6570\u662f\u6709\u7b26\u53f7\u8fd8\u662f\u65e0\u7b26\u53f7\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u4f4d\u8fd0\u7b97\u7684\u89c4\u5219\u548c\u7279\u6027\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul>\n<li>\u4f4d\u8fd0\u7b97\u7b26\u901a\u5e38\u4f5c\u7528\u4e8e\u6574\u6570\u7c7b\u578b\u3002<\/li>\n\n\n\n<li>\u4f4d\u8fd0\u7b97\u7b26\u7684\u4f18\u5148\u7ea7\u4f4e\u4e8e\u7b97\u672f\u8fd0\u7b97\u7b26\uff0c\u4f46\u9ad8\u4e8e\u6bd4\u8f83\u8fd0\u7b97\u7b26\u3002<\/li>\n\n\n\n<li>\u4f4d\u8fd0\u7b97\u7b26\u53ef\u4ee5\u7528\u4e8e\u8bbe\u7f6e\u3001\u6e05\u9664\u3001\u7ffb\u8f6c\u548c\u6d4b\u8bd5\u7279\u5b9a\u7684\u4f4d\u3002<\/li>\n\n\n\n<li>\u4f4d\u8fd0\u7b97\u7b26\u53ef\u4ee5\u7528\u4e8e\u4f18\u5316\u67d0\u4e9b\u7b97\u6cd5\uff0c\u6bd4\u5982\u8ba1\u7b97\u6700\u5927\u516c\u7ea6\u6570\u7684\u6b27\u51e0\u91cc\u5f97\u7b97\u6cd5\u3002<\/li>\n\n\n\n<li>\u4f4d\u8fd0\u7b97\u7b26\u53ef\u4ee5\u7528\u4e8e\u4f4d\u57df\u64cd\u4f5c\uff0c\u5373\u5728\u5e95\u5c42\u7f16\u7a0b\u4e2d\u63a7\u5236\u786c\u4ef6\u5bc4\u5b58\u5668\u7684\u7279\u5b9a\u4f4d\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4f4d\u8fd0\u7b97\u5728\u7f16\u7a0b\u4e2d\u7684\u5e94\u7528\u975e\u5e38\u5e7f\u6cdb\uff0c\u7279\u522b\u662f\u5728\u9700\u8981\u4f18\u5316\u6027\u80fd\u548c\u8d44\u6e90\u4f7f\u7528\u7684\u60c5\u51b5\u4e0b\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-accent-1-color has-text-color has-link-color has-large-font-size wp-elements-bcb1cbd0be92e5e4b384b64647397166\"><strong>LeetCode\u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n<p><a href=\"https:\/\/leetcode.cn\/problems\/single-number\/\">136. \u53ea\u51fa\u73b0\u4e00\u6b21\u7684\u6570\u5b57<\/a><\/p>\n\n\n\n<p>\u7ed9\u4f60\u4e00\u4e2a&nbsp;<strong>\u975e\u7a7a<\/strong>&nbsp;\u6574\u6570\u6570\u7ec4&nbsp;<code>nums<\/code>&nbsp;\uff0c\u9664\u4e86\u67d0\u4e2a\u5143\u7d20\u53ea\u51fa\u73b0\u4e00\u6b21\u4ee5\u5916\uff0c\u5176\u4f59\u6bcf\u4e2a\u5143\u7d20\u5747\u51fa\u73b0\u4e24\u6b21\u3002\u627e\u51fa\u90a3\u4e2a\u53ea\u51fa\u73b0\u4e86\u4e00\u6b21\u7684\u5143\u7d20\u3002<\/p>\n\n\n\n<p>\u4f60\u5fc5\u987b\u8bbe\u8ba1\u5e76\u5b9e\u73b0\u7ebf\u6027\u65f6\u95f4\u590d\u6742\u5ea6\u7684\u7b97\u6cd5\u6765\u89e3\u51b3\u6b64\u95ee\u9898\uff0c\u4e14\u8be5\u7b97\u6cd5\u53ea\u4f7f\u7528\u5e38\u91cf\u989d\u5916\u7a7a\u95f4\u3002<\/p>\n\n\n\n<p><strong>\u793a\u4f8b 1 \uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>\u8f93\u5165\uff1a<\/strong>nums = [2,2,1]\n<strong>\u8f93\u51fa\uff1a<\/strong>1\n<\/pre>\n\n\n\n<p><strong>\u793a\u4f8b 2 \uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>\u8f93\u5165\uff1a<\/strong>nums = [4,1,2,1,2]\n<strong>\u8f93\u51fa\uff1a<\/strong>4\n<\/pre>\n\n\n\n<p><strong>\u793a\u4f8b 3 \uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><strong>\u8f93\u5165\uff1a<\/strong>nums = [1]\n<strong>\u8f93\u51fa\uff1a<\/strong>1\n<\/pre>\n\n\n\n<p><strong>\u63d0\u793a\uff1a<\/strong><\/p>\n\n\n\n<ul>\n<li><code>1 &lt;= nums.length &lt;= 3 * 10<sup>4<\/sup><\/code><\/li>\n\n\n\n<li><code>-3 * 10<sup>4<\/sup> &lt;= nums[i] &lt;= 3 * 10<sup>4<\/sup><\/code><\/li>\n\n\n\n<li>\u9664\u4e86\u67d0\u4e2a\u5143\u7d20\u53ea\u51fa\u73b0\u4e00\u6b21\u4ee5\u5916\uff0c\u5176\u4f59\u6bcf\u4e2a\u5143\u7d20\u5747\u51fa\u73b0\u4e24\u6b21\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u89e3\u9898\u601d\u8def\uff1a<\/strong><br>\u6807\u7b7e\uff1a\u4f4d\u8fd0\u7b97<br>\u672c\u9898\u6839\u636e\u9898\u610f\uff0c\u7ebf\u6027\u65f6\u95f4\u590d\u6742\u5ea6 O(n)\uff0c\u5f88\u5bb9\u6613\u60f3\u5230\u4f7f\u7528 Hash \u6620\u5c04\u6765\u8fdb\u884c\u8ba1\u7b97\uff0c\u904d\u5386\u4e00\u6b21\u540e\u7ed3\u675f\u5f97\u5230\u7ed3\u679c\uff0c\u4f46\u662f\u5728\u7a7a\u95f4\u590d\u6742\u5ea6\u4e0a\u4f1a\u8fbe\u5230 O(n)\uff0c\u9700\u8981\u4f7f\u7528\u8f83\u591a\u7684\u989d\u5916\u7a7a\u95f4<br>\u65e2\u6ee1\u8db3\u65f6\u95f4\u590d\u6742\u5ea6\u53c8\u6ee1\u8db3\u7a7a\u95f4\u590d\u6742\u5ea6\uff0c\u5c31\u8981\u63d0\u5230\u4f4d\u8fd0\u7b97\u4e2d\u7684\u5f02\u6216\u8fd0\u7b97 XOR\uff0c\u4e3b\u8981\u56e0\u4e3a\u5f02\u6216\u8fd0\u7b97\u6709\u4ee5\u4e0b\u51e0\u4e2a\u7279\u70b9\uff1a<br>\u4e00\u4e2a\u6570\u548c 0 \u505a XOR \u8fd0\u7b97\u7b49\u4e8e\u672c\u8eab\uff1aa\u22950 = a<br>\u4e00\u4e2a\u6570\u548c\u5176\u672c\u8eab\u505a XOR \u8fd0\u7b97\u7b49\u4e8e 0\uff1aa\u2295a = 0<br>XOR \u8fd0\u7b97\u6ee1\u8db3\u4ea4\u6362\u5f8b\u548c\u7ed3\u5408\u5f8b\uff1aa\u2295b\u2295a = (a\u2295a)\u2295b = 0\u2295b = b<br>\u6545\u800c\u5728\u4ee5\u4e0a\u7684\u57fa\u7840\u6761\u4ef6\u4e0a\uff0c\u5c06\u6240\u6709\u6570\u5b57\u6309\u7167\u987a\u5e8f\u505a\u6291\u6216\u8fd0\u7b97\uff0c\u6700\u540e\u5269\u4e0b\u7684\u7ed3\u679c\u5373\u4e3a\u552f\u4e00\u7684\u6570\u5b57<br>\u65f6\u95f4\u590d\u6742\u5ea6\uff1aO(n)\uff0c\u7a7a\u95f4\u590d\u6742\u5ea6\uff1aO(1)<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>\u7b54\u6848\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class Solution {\npublic:\n&nbsp; &nbsp; int singleNumber(vector&lt;int&gt;&amp; nums) {\n&nbsp; &nbsp; &nbsp; &nbsp; int ans=0;\n&nbsp; &nbsp; &nbsp; &nbsp; for(int k:nums){\n&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ans^=k;\n&nbsp; &nbsp; &nbsp; &nbsp; }\n&nbsp; &nbsp; &nbsp; &nbsp; return k;\n&nbsp; &nbsp; }\n};<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u4f4d\u8fd0\u7b97\u662f\u8ba1\u7b97\u673a\u79d1\u5b66\u4e2d\u5bf9\u4e8c\u8fdb\u5236\u6570\u8fdb\u884c\u64cd\u4f5c\u7684\u4e00\u79cd\u8fd0\u7b97\u65b9 &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[29],"_links":{"self":[{"href":"https:\/\/www.sxr666.cn\/index.php\/wp-json\/wp\/v2\/posts\/567"}],"collection":[{"href":"https:\/\/www.sxr666.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sxr666.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sxr666.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sxr666.cn\/index.php\/wp-json\/wp\/v2\/comments?post=567"}],"version-history":[{"count":6,"href":"https:\/\/www.sxr666.cn\/index.php\/wp-json\/wp\/v2\/posts\/567\/revisions"}],"predecessor-version":[{"id":576,"href":"https:\/\/www.sxr666.cn\/index.php\/wp-json\/wp\/v2\/posts\/567\/revisions\/576"}],"wp:attachment":[{"href":"https:\/\/www.sxr666.cn\/index.php\/wp-json\/wp\/v2\/media?parent=567"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sxr666.cn\/index.php\/wp-json\/wp\/v2\/categories?post=567"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sxr666.cn\/index.php\/wp-json\/wp\/v2\/tags?post=567"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}