{"id":293,"date":"2020-09-26T10:17:01","date_gmt":"2020-09-26T02:17:01","guid":{"rendered":"http:\/\/39.96.58.60\/?p=293"},"modified":"2022-10-18T16:44:00","modified_gmt":"2022-10-18T08:44:00","slug":"leetcode-15-%e4%b8%89%e6%95%b0%e4%b9%8b%e5%92%8c","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=293","title":{"rendered":"Leetcode 15. \u4e09\u6570\u4e4b\u548c"},"content":{"rendered":"<p>\u7ed9\u4f60\u4e00\u4e2a\u5305\u542b <em>n<\/em> \u4e2a\u6574\u6570\u7684\u6570\u7ec4&nbsp;<code>nums<\/code>\uff0c\u5224\u65ad&nbsp;<code>nums<\/code>&nbsp;\u4e2d\u662f\u5426\u5b58\u5728\u4e09\u4e2a\u5143\u7d20 <em>a\uff0cb\uff0cc \uff0c<\/em>\u4f7f\u5f97&nbsp;<em>a + b + c = <\/em>0 \uff1f\u8bf7\u4f60\u627e\u51fa\u6240\u6709\u6ee1\u8db3\u6761\u4ef6\u4e14\u4e0d\u91cd\u590d\u7684\u4e09\u5143\u7ec4\u3002<\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong>\u7b54\u6848\u4e2d\u4e0d\u53ef\u4ee5\u5305\u542b\u91cd\u590d\u7684\u4e09\u5143\u7ec4\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre>\u7ed9\u5b9a\u6570\u7ec4 nums = [-1, 0, 1, 2, -1, -4]\uff0c\n\n\n\n\u6ee1\u8db3\u8981\u6c42\u7684\u4e09\u5143\u7ec4\u96c6\u5408\u4e3a\uff1a\n\n[\n\n  [-1, 0, 1],\n\n  [-1, -1, 2]\n\n]\n\n<\/pre>\n<p>**\u96be\u5ea6**: Medium<\/p>\n<p>**\u6807\u7b7e**: \u6570\u7ec4\u3001 \u53cc\u6307\u9488\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\uff1a972 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8661.82% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a16 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8696.71% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u53cc\u6307\u9488\u6cd5\uff0c\u56fa\u5b9a\u4e00\u4e2a\u503c\uff0c\u7136\u540e\u53cc\u6307\u9488\u904d\u5386\u5176\u4f59\u503c\n    \u5148\u5bf9\u5217\u8868\u8fdb\u884c\u6392\u5e8f\n    i \u5faa\u73af\u904d\u5386\u5217\u8868\uff0c\u4f5c\u4e3a\u56fa\u5b9a\u503c\n    l, r \u4f5c\u4e3a\u5de6\u53f3\u6307\u9488\uff0c\u5206\u522b\u53bb\u904d\u5386\u5269\u4f59\u503c\n    \u5177\u4f53\u5b9e\u73b0\u89c1\u4ee3\u7801\u6ce8\u91ca\n\"\"\"\nclass Solution:\n    def threeSum(self, nums: List[int]) -&gt; List[List[int]]:\n        nums.sort()\n        n = len(nums)\n        now = None  # \u7528\u4e8e\u8bb0\u5f55\u56fa\u5b9a\u503c\uff0c\u5224\u65ad\u662f\u5426\u91cd\u590d\n        result = []\n        for i in range(n):\n            if nums[i] == now:  # \u9047\u5230\u91cd\u590d\u7684\u503c\uff0c\u8df3\u8fc7\n                continue\n            now = nums[i]\n            if nums[i] &gt; 0: # \u5982\u679c\u5f53\u524d\u503c\u5927\u4e8e0\uff0c\u5219\u4e4b\u540e\u7684\u548c\u7edd\u5bf9\u5927\u4e8e0\uff0c\u8df3\u51fa\uff08\u56e0\u4e3a\u5df2\u6392\u5e8f\uff09\n                break\n            l, r = i+1, n-1 # \u5de6\u53f3\u6307\u9488\n            while l<r: #=\"\" \u5de6\u6307\u9488\u5c0f\u4e8e\u53f3\u6307\u9488\uff0c\u5faa\u73af=\"\" if=\"\" nums[i]=\"\" +=\"\" nums[l]=\"\" nums[r]=\"=\" 0:=\"\" \u548c\u4e3a0=\"\" result.append([nums[i],=\"\" nums[l],=\"\" nums[r]])=\"\" \u6dfb\u52a0\u8fdb\u7ed3\u679c=\"\" while=\"\" l=\"\" <=\"\" r=\"\" and=\"\" nums[l+1]:=\"\" \u5de6\u6307\u9488\u53bb\u91cd\u590d=\"\" nums[r-1]:=\"\" \u53f3\u6307\u9488\u53bb\u91cd\u590d=\"\" -=\"1\" elif=\"\" \u548c<0\uff0c=\"\" \u5de6\u6307\u9488\u53f3\u79fb=\"\" else:=\"\" \u548c=\"\">0\uff0c \u53f3\u6307\u9488\u5de6\u79fb\n                    r -= 1\n        return result<\/r:><\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u4f60\u4e00\u4e2a\u5305\u542b n \u4e2a\u6574\u6570\u7684\u6570\u7ec4&nbsp;nums\uff0c\u5224\u65ad&nbsp;nums&nbsp;\u4e2d\u662f\u5426\u5b58\u5728\u4e09\u4e2a\u5143\u7d20 a&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","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\/293"}],"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=293"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/293\/revisions"}],"predecessor-version":[{"id":294,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/293\/revisions\/294"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=293"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=293"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=293"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}