{"id":896,"date":"2025-10-24T17:15:32","date_gmt":"2025-10-24T09:15:32","guid":{"rendered":"https:\/\/www.guanhaobo.cn\/?p=896"},"modified":"2025-10-24T17:57:42","modified_gmt":"2025-10-24T09:57:42","slug":"leetcode-189-%e8%bd%ae%e8%bd%ac%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/www.guanhaobo.cn\/?p=896","title":{"rendered":"LeetCode 189 \u2013 \u8f6e\u8f6c\u6570\u7ec4"},"content":{"rendered":"

\u9898\u76ee\u63cf\u8ff0<\/h1>\n

\u7ed9\u5b9a\u4e00\u4e2a\u6574\u6570\u6570\u7ec4 nums\uff0c\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u5411\u53f3\u8f6e\u8f6c k \u4e2a\u4f4d\u7f6e\uff0c\u5176\u4e2d k \u662f\u975e\u8d1f\u6570\u3002<\/p>\n

\u793a\u4f8b 1:<\/p>\n

\u8f93\u5165: nums = [1,2,3,4,5,6,7], k = 3
\n\u8f93\u51fa: [5,6,7,1,2,3,4]
\n\u89e3\u91ca:
\n\u5411\u53f3\u8f6e\u8f6c 1 \u6b65: [7,1,2,3,4,5,6]
\n\u5411\u53f3\u8f6e\u8f6c 2 \u6b65: [6,7,1,2,3,4,5]
\n\u5411\u53f3\u8f6e\u8f6c 3 \u6b65: [5,6,7,1,2,3,4]<\/p>\n

\u9898\u76ee\u5206\u6790<\/h1>\n

\u4ec5\u5206\u6790\u7a7a\u95f4\u590d\u6742\u5ea6 O(1) \u7684\u7b97\u6cd5<\/p>\n

\u73af\u72b6\u66ff\u6362<\/h2>\n

\u628a\u7b2c1\u4e2a\u6570\u5b57\u5411\u540e\u79fb\u52a8 k \u4f4d\uff0c\u7136\u540e\u628a\u88ab\u53d6\u4ee3\u7684\u6570\u5b57\u4e5f\u5411\u53f3\u79fb\u52a8 k \u4f4d\uff0c\u4e0d\u65ad\u91cd\u590d\uff0c\u6700\u7ec8\u4f1a\u91cd\u65b0\u56de\u5230\u7b2c\u4e00\u4e2a\u6570\u5b57\u7684\u4f4d\u7f6e\u3002
\n\u4f46\u662f\u53ef\u80fd\u8fd8\u6709\u5269\u4f59\u7684\u4f4d\u7f6e\u6ca1\u6709\u88ab\u79fb\u52a8\uff0c\u6240\u4ee5\u518d\u4ece\u7b2c2\u4e2a\u6570\u5b57\u5f00\u59cb\u79fb\u52a8\u3002\u540c\u65f6\u7edf\u8ba1\u4e00\u4e0b\u4e00\u5171\u6709\u591a\u5c11\u6570\u5b57\u88ab\u79fb\u52a8\u8fc7\uff0c\u79fb\u52a8\u6b21\u6570\u548c\u6570\u7ec4\u5927\u5c0f\u76f8\u540c\u65f6\uff0c\u8bf4\u660e\u6240\u6709\u6570\u5b57\u90fd\u88ab\u79fb\u52a8\u8fc71\u6b21\u4e86\u3002<\/p>\n

\u65f6\u95f4\u590d\u6742\u5ea6O(n), \u7a7a\u95f4\u590d\u6742\u5ea6 O(1)<\/p>\n

\u539f\u5730\u7ffb\u8f6c<\/h2>\n

\u7ffb\u8f6c3\u6b21\uff0c\u53ef\u4ee5\u5f97\u5230\u7ed3\u679c\uff0c\u4ee5 nums = [1,2,3,4,5,6,7], k = 3 \u4e3a\u4f8b
\n1. \u6574\u4f53\u7ffb\u8f6c
\n [7,6,5,4,3,2,1]
\n2. \u7ffb\u8f6c [0, k)
\n [5,6,7,4,3,2,1]
\n3. \u7ffb\u8f6c [k, n)
\n [5,6,7,1,2,3,4]<\/p>\n

\u65f6\u95f4\u590d\u6742\u5ea6O(n), \u7a7a\u95f4\u590d\u6742\u5ea6 O(1)<\/p>\n

Java<\/h1>\n
\/\/ \u73af\u72b6\u66ff\u6362\npublic void rotate1(int[] nums, int k) {\n    int count = nums.length;\n    for (int i = 0; i < nums.length; i++) {\n        int cur = i;\n        int last = nums[i];\n        do {\n            int next = (cur + k) % nums.length;\n            int temp = nums[next];\n            nums[next] = last;\n\n            last = temp;\n            cur = next;\n            count--;\n        } while (cur != i);\n        if (count == 0) {\n            break;\n        }\n    }\n}\n\n\/\/ \u539f\u5730\u7ffb\u8f6c\npublic void rotate2(int[] nums, int k) {\n    int realK = k % nums.length;\n    reverse(nums, 0, nums.length - 1);\n    reverse(nums, 0, realK - 1);\n    reverse(nums, realK, nums.length - 1);\n}\n\nprivate void reverse(int[] nums, int start, int end) {\n    while (start < end) {\n        int temp = nums[end];\n        nums[end] = nums[start];\n        nums[start] = temp;\n        end--;\n        start++;\n    }\n}\n<\/code><\/pre>\n
Kotlin<\/h1>\n
\/\/ \u73af\u72b6\u66ff\u6362\nfun rotate1(nums: IntArray, k: Int): Unit {\n    val realK = k % nums.size\n    if (realK == 0) {\n        return\n    }\n    var count = nums.size\n    var last = 0\n    for (i in nums.indices) {\n        var cur = i\n        last = nums[i]\n        do {\n            val next = (cur + realK) % nums.size\n            val temp = nums[next]\n            nums[next] = last\n\n            cur = next\n            last = temp\n            count--\n        } while (cur != i)\n        if (count == 0) {\n            break\n        }\n    }\n}\n\n\/\/ \u539f\u5730\u7ffb\u8f6c\nfun rotate2(nums: IntArray, k: Int): Unit {\n    val realK = k % nums.size\n    if (realK == 0) {\n        return\n    }\n    nums.reverse()\n    nums.reverse(0, realK)\n    nums.reverse(realK, nums.size)\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u9898\u76ee\u63cf\u8ff0 \u7ed9\u5b9a\u4e00\u4e2a\u6574\u6570\u6570\u7ec4 nums\uff0c\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u5411\u53f3\u8f6e\u8f6c k \u4e2a\u4f4d\u7f6e\uff0c\u5176\u4e2d k \u662f\u975e\u8d1f\u6570\u3002 \u793a\u4f8b 1: \u8f93 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[20,82,73],"class_list":["post-896","post","type-post","status-publish","format-standard","hentry","category-algo","tag-leetcode","tag-82","tag-73"],"_links":{"self":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/896","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=896"}],"version-history":[{"count":1,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/896\/revisions"}],"predecessor-version":[{"id":897,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/896\/revisions\/897"}],"wp:attachment":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=896"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=896"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=896"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}