{"id":294,"date":"2025-08-27T17:16:03","date_gmt":"2025-08-27T09:16:03","guid":{"rendered":"https:\/\/heyingnian.com\/?p=294"},"modified":"2025-08-28T10:11:52","modified_gmt":"2025-08-28T02:11:52","slug":"%e6%97%8b%e8%bd%ac%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/heyingnian.com\/index.php\/2025\/08\/27\/%e6%97%8b%e8%bd%ac%e6%95%b0%e7%bb%84\/","title":{"rendered":"\u8f6c\u8f6e\u6570\u7ec4"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">\ud83d\udd17 \u8f6c\u8f6e\u6570\u7ec4<\/h1>\n\n\n\n<p>\u9898\u76ee\u6765\u6e90\uff1a<a target=\"_blank\" rel=\"noreferrer noopener\"><\/a><a href=\"https:\/\/leetcode.cn\/problems\/rotate-array\/?envType=study-plan-v2&amp;envId=top-100-liked\" target=\"_blank\" rel=\"noopener\">189. \u8f6e\u8f6c\u6570\u7ec4 &#8211; \u529b\u6263\uff08LeetCode\uff09<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\ud83d\udccc \u9898\u76ee\u63cf\u8ff0<\/p>\n\n\n\n<p>\u7ed9\u5b9a\u4e00\u4e2a\u6574\u6570\u6570\u7ec4 <code>nums<\/code>\uff0c\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20<strong>\u5411\u53f3\u8f6e\u8f6c <code>k<\/code> \u4e2a\u4f4d\u7f6e<\/strong>\uff0c\u5176\u4e2d <code>k<\/code> \u662f\u975e\u8d1f\u6570\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u8f6e\u8f6c<\/strong>\uff1a\u5c06\u6570\u7ec4\u672b\u5c3e\u7684\u5143\u7d20\u79fb\u52a8\u5230\u5f00\u5934\u3002<\/li>\n\n\n\n<li>\u8981\u6c42<strong>\u539f\u5730\u4fee\u6539<\/strong>\u6570\u7ec4\uff08\u4e0d\u8fd4\u56de\u65b0\u6570\u7ec4\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u2705 \u793a\u4f8b\u89e3\u6790<\/p>\n\n\n\n<p>\u793a\u4f8b 1\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8f93\u5165\uff1a<code>nums = [1,2,3,4,5,6,7]<\/code>,&nbsp;<code>k = 3<\/code><\/li>\n\n\n\n<li>\u8f93\u51fa\uff1a<code>[5,6,7,1,2,3,4]<\/code><\/li>\n\n\n\n<li>\u89e3\u91ca\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5411\u53f3\u8f6e\u8f6c 1 \u6b65\uff1a<code>[7,1,2,3,4,5,6]<\/code><\/li>\n\n\n\n<li>\u5411\u53f3\u8f6e\u8f6c 2 \u6b65\uff1a<code>[6,7,1,2,3,4,5]<\/code><\/li>\n\n\n\n<li>\u5411\u53f3\u8f6e\u8f6c 3 \u6b65\uff1a<code>[5,6,7,1,2,3,4]<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\u793a\u4f8b 2\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8f93\u5165\uff1a<code>nums = [-1,-100,3,99]<\/code>,&nbsp;<code>k = 2<\/code><\/li>\n\n\n\n<li>\u8f93\u51fa\uff1a<code>[3,99,-1,-100]<\/code><\/li>\n\n\n\n<li>\u89e3\u91ca\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5411\u53f3\u8f6e\u8f6c 1 \u6b65\uff1a<code>[99,-1,-100,3]<\/code><\/li>\n\n\n\n<li>\u5411\u53f3\u8f6e\u8f6c 2 \u6b65\uff1a<code>[3,99,-1,-100]<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u26a0\ufe0f \u63d0\u793a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>1 &lt;= nums.length &lt;= 10\u2075<\/code><\/li>\n\n\n\n<li><code>-2\u00b3\u00b9 &lt;= nums[i] &lt;= 2\u00b3\u00b9 - 1<\/code><\/li>\n\n\n\n<li><code>0 &lt;= k &lt;= 10\u2075<\/code><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\ud83d\udca1 \u89e3\u6cd5\uff1a\u4e09\u6b21\u53cd\u8f6c\uff08\u539f\u5730\u7b97\u6cd5\uff09\u2014\u2014 O(n) \u65f6\u95f4\uff0cO(1) \u7a7a\u95f4<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class Solution {\n    public void rotate(int&#91;] nums, int k) {\n        int len = nums.length;\n        k = k % len;  \/\/ \u5904\u7406 k \u5927\u4e8e\u6570\u7ec4\u957f\u5ea6\u7684\u60c5\u51b5\n        reverse(nums, 0, len - 1);\n        reverse(nums, 0, k - 1);\n        reverse(nums, k, len - 1);\n    }\n\n    public void reverse(int&#91;] nums, int l, int r) {\n        while (l &lt; r) {\n            int temp = nums&#91;l];\n            nums&#91;l] = nums&#91;r];\n            nums&#91;r] = temp;\n            l++;\n            r--;\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\ud83d\udcca \u590d\u6742\u5ea6\u5206\u6790<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u65f6\u95f4\u590d\u6742\u5ea6\uff1aO(n)<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u6bcf\u6b21&nbsp;<code>reverse<\/code>&nbsp;\u64cd\u4f5c\u4e3a O(n)\uff0c\u5171\u6267\u884c 3 \u6b21\uff0c\u603b\u4f53\u4ecd\u4e3a\u7ebf\u6027\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u7a7a\u95f4\u590d\u6742\u5ea6\uff1aO(1)<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u4ec5\u4f7f\u7528\u5e38\u6570\u4e2a\u989d\u5916\u53d8\u91cf\uff08\u5982&nbsp;<code>temp<\/code>\uff09\uff0c\u6ee1\u8db3\u539f\u5730\u4fee\u6539\u8981\u6c42\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\ud83e\udde9 \u89e3\u9898\u601d\u8def<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6838\u5fc3\u601d\u60f3\uff1a\u4e09\u6b21\u53cd\u8f6c\u6cd5<\/strong><br>\u5229\u7528<strong>\u53cd\u8f6c\u64cd\u4f5c<\/strong>\u5de7\u5999\u5730\u5b9e\u73b0\u8f6e\u8f6c\uff0c\u65e0\u9700\u989d\u5916\u6570\u7ec4\u3002<\/li>\n\n\n\n<li><strong>\u6570\u5b66\u539f\u7406<\/strong>\uff1a<br>\u8bbe\u6570\u7ec4\u957f\u5ea6\u4e3a <code>n<\/code>\uff0c\u8f6e\u8f6c <code>k<\/code> \u6b65\u540e\uff1a<ul><li>\u539f\u6570\u7ec4\u540e&nbsp;<code>k<\/code>&nbsp;\u4e2a\u5143\u7d20\uff08<code>[n-k, n-1]<\/code>\uff09\u79fb\u52a8\u5230\u524d&nbsp;<code>k<\/code>&nbsp;\u4e2a\u4f4d\u7f6e<\/li><li>\u539f\u6570\u7ec4\u524d&nbsp;<code>n-k<\/code>&nbsp;\u4e2a\u5143\u7d20\uff08<code>[0, n-k-1]<\/code>\uff09\u79fb\u52a8\u5230\u540e&nbsp;<code>n-k<\/code>&nbsp;\u4e2a\u4f4d\u7f6e<\/li><\/ul>\u901a\u8fc7\u4ee5\u4e0b\u4e09\u6b65\u53ef\u5b9e\u73b0\uff1a\n<ul class=\"wp-block-list\">\n<li><strong>\u6b65\u9aa4 1<\/strong>\uff1a\u53cd\u8f6c\u6574\u4e2a\u6570\u7ec4 \u2192&nbsp;<code>[n-1, n-2, ..., 0]<\/code><\/li>\n\n\n\n<li><strong>\u6b65\u9aa4 2<\/strong>\uff1a\u53cd\u8f6c\u524d&nbsp;<code>k<\/code>&nbsp;\u4e2a\u5143\u7d20 \u2192 \u5c06\u539f\u540e&nbsp;<code>k<\/code>&nbsp;\u4e2a\u5143\u7d20\u6062\u590d\u4e3a\u6b63\u5e8f<\/li>\n\n\n\n<li><strong>\u6b65\u9aa4 3<\/strong>\uff1a\u53cd\u8f6c\u540e&nbsp;<code>n-k<\/code>&nbsp;\u4e2a\u5143\u7d20 \u2192 \u5c06\u539f\u524d&nbsp;<code>n-k<\/code>&nbsp;\u4e2a\u5143\u7d20\u6062\u590d\u4e3a\u6b63\u5e8f<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u4e3e\u4f8b\u8bf4\u660e<\/strong>\uff1a<br>\u5bf9 <code>nums = [1,2,3,4,5,6,7]<\/code>, <code>k = 3<\/code>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u6b65\u9aa4 1\uff1a\u53cd\u8f6c\u6574\u4e2a\u6570\u7ec4 \u2192&nbsp;<code>[7,6,5,4,3,2,1]<\/code><\/li>\n\n\n\n<li>\u6b65\u9aa4 2\uff1a\u53cd\u8f6c\u524d&nbsp;<code>k=3<\/code>&nbsp;\u4e2a \u2192&nbsp;<code>[5,6,7,4,3,2,1]<\/code><\/li>\n\n\n\n<li>\u6b65\u9aa4 3\uff1a\u53cd\u8f6c\u540e&nbsp;<code>4<\/code>&nbsp;\u4e2a \u2192&nbsp;<code>[5,6,7,1,2,3,4]<\/code>&nbsp;\u2705<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u8fb9\u754c\u5904\u7406<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li><code>k %= len<\/code>\uff1a\u907f\u514d&nbsp;<code>k<\/code>&nbsp;\u5927\u4e8e\u6570\u7ec4\u957f\u5ea6\uff0c\u51cf\u5c11\u65e0\u6548\u8f6e\u8f6c\u3002<\/li>\n\n\n\n<li>\u5f53&nbsp;<code>k == 0<\/code>&nbsp;\u65f6\uff0c\u65e0\u9700\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u4e3a\u4ec0\u4e48\u80fd\u539f\u5730\u5b9e\u73b0\uff1f<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u53cd\u8f6c\u64cd\u4f5c\u672c\u8eab\u53ef\u5728\u539f\u6570\u7ec4\u4e0a\u5b8c\u6210\u3002<\/li>\n\n\n\n<li>\u65e0\u9700\u8bb0\u5f55\u6bcf\u4e2a\u5143\u7d20\u7684\u65b0\u4f4d\u7f6e\uff0c\u901a\u8fc7\u6574\u4f53\u64cd\u4f5c\u8fbe\u6210\u76ee\u6807\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udd17 \u8f6c\u8f6e\u6570\u7ec4 \u9898\u76ee\u6765\u6e90\uff1a189. \u8f6e\u8f6c\u6570\u7ec4 &#8211; \u529b\u6263\uff08LeetCode\uff09 \ud83d\udccc \u9898\u76ee\u63cf\u8ff0 \u7ed9\u5b9a\u4e00\u4e2a\u6574 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30,12],"tags":[34,31,14],"class_list":["post-294","post","type-post","status-publish","format-standard","hentry","category-ordinary_arrays","category-algorithm","tag-mathematics","tag-array","tag-algorithm"],"_links":{"self":[{"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/posts\/294","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/comments?post=294"}],"version-history":[{"count":2,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/posts\/294\/revisions"}],"predecessor-version":[{"id":297,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/posts\/294\/revisions\/297"}],"wp:attachment":[{"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/media?parent=294"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/categories?post=294"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/tags?post=294"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}