{"id":703,"date":"2020-09-26T11:12:33","date_gmt":"2020-09-26T03:12:33","guid":{"rendered":"http:\/\/39.96.58.60\/?p=703"},"modified":"2022-10-18T16:38:16","modified_gmt":"2022-10-18T08:38:16","slug":"leetcode-24-%e4%b8%a4%e4%b8%a4%e4%ba%a4%e6%8d%a2%e9%93%be%e8%a1%a8%e4%b8%ad%e7%9a%84%e8%8a%82%e7%82%b9","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=703","title":{"rendered":"Leetcode 24. \u4e24\u4e24\u4ea4\u6362\u94fe\u8868\u4e2d\u7684\u8282\u70b9"},"content":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u94fe\u8868\uff0c\u4e24\u4e24\u4ea4\u6362\u5176\u4e2d\u76f8\u90bb\u7684\u8282\u70b9\uff0c\u5e76\u8fd4\u56de\u4ea4\u6362\u540e\u7684\u94fe\u8868\u3002<\/p>\n<p><strong>\u4f60\u4e0d\u80fd\u53ea\u662f\u5355\u7eaf\u7684\u6539\u53d8\u8282\u70b9\u5185\u90e8\u7684\u503c<\/strong>\uff0c\u800c\u662f\u9700\u8981\u5b9e\u9645\u7684\u8fdb\u884c\u8282\u70b9\u4ea4\u6362\u3002<\/p>\n<p><strong>\u793a\u4f8b:<\/strong><\/p>\n<pre>\u7ed9\u5b9a <code>1-&gt;2-&gt;3-&gt;4<\/code>, \u4f60\u5e94\u8be5\u8fd4\u56de <code>2-&gt;1-&gt;4-&gt;3<\/code>.<\/pre>\n<p>**\u96be\u5ea6**: Medium<\/p>\n<p>**\u6807\u7b7e**: \u94fe\u8868\u3001<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism undefined-numbers lang-python\" data-lang=\"Python\"><code>\n# -*- coding: utf-8 -*-\n# @Author  : LG\n\n\"\"\"\n\u6267\u884c\u7528\u65f6\uff1a32 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8697.79% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a13.2 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8694.82% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u65b0\u5efa\u4e00\u4e2a\u94fe\u8868\n    \u901a\u8fc7\u6307\u9488p\uff0c\u5411\u65b0\u5efa\u94fe\u8868\u4e2d\u6dfb\u52a0\u8282\u70b9\u3002\n    \u9700\u8981\u6ce8\u610f\u5c3e\u90e8\u7684\u5904\u7406\n    \u8be6\u89c1\u4ee3\u7801\u6ce8\u91ca\n\"\"\"\nclass Solution:\n    def swapPairs(self, head: ListNode) -&gt; ListNode:\n        result = ListNode(0, next=None) # \u65b0\u5efa\u94fe\u8868\n        r = result  # \u65b0\u5efa\u94fe\u8868\u6307\u9488\n        p = head    # \u539f\u94fe\u8868\u6307\u9488\n        while p:\n            if p.next:  # \u5904\u7406\u5b58\u5728\u5076\u6570\u4e2a\u8282\u70b9\u7684\u60c5\u51b5\uff0c\u9700\u8981\u7ffb\u8f6c\n                q = p.next.next     # \u7528\u4e8e\u8bb0\u5f55\u4e0b\u6b21p\u6307\u9488\u7684\u4f4d\u7f6e\n                r.next = p.next     # \u5148\u6dfb\u52a0p\u8282\u70b9\u7684\u4e0b\u4e00\u4e2a\u8282\u70b9  \u7ffb\u8f6c\n                r.next.next = p     # \u518d\u6dfb\u52a0p\u8282\u70b9            \u7ffb\u8f6c\n                r = r.next.next     # \u66f4\u65b0\u65b0\u94fe\u8868\u6307\u9488\n                p = q\n            else:       # \u5269\u4f59\u4e00\u4e2a\u8282\u70b9\u7684\u60c5\u51b5\uff0c\u76f4\u63a5\u6dfb\u52a0\u5373\u53ef\n                q = p.next\n                r.next = p\n                p = q\n                r = r.next\n        r.next = p  # \u5c06\u6700\u540e\u7684none\u6dfb\u52a0\u5230\u65b0\u94fe\u8868\u4e2d\n        return result.next<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u94fe\u8868\uff0c\u4e24\u4e24\u4ea4\u6362\u5176\u4e2d\u76f8\u90bb\u7684\u8282\u70b9\uff0c\u5e76\u8fd4\u56de\u4ea4\u6362\u540e\u7684\u94fe\u8868\u3002 \u4f60\u4e0d\u80fd\u53ea\u662f\u5355\u7eaf\u7684\u6539\u53d8\u8282\u70b9\u5185\u90e8\u7684\u503c\uff0c\u800c\u662f\u9700\u8981\u5b9e\u9645\u7684\u8fdb&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":[],"categories":[11,1],"tags":[],"_links":{"self":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/703"}],"collection":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=703"}],"version-history":[{"count":2,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/703\/revisions"}],"predecessor-version":[{"id":754,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/703\/revisions\/754"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=703"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=703"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=703"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}