{"id":489,"date":"2020-09-26T10:47:51","date_gmt":"2020-09-26T02:47:51","guid":{"rendered":"http:\/\/39.96.58.60\/?p=489"},"modified":"2022-10-18T16:39:03","modified_gmt":"2022-10-18T08:39:03","slug":"leetcode-%e5%89%91%e6%8c%87-offer-42-%e8%bf%9e%e7%bb%ad%e5%ad%90%e6%95%b0%e7%bb%84%e7%9a%84%e6%9c%80%e5%a4%a7%e5%92%8c","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=489","title":{"rendered":"Leetcode \u5251\u6307 Offer 42. \u8fde\u7eed\u5b50\u6570\u7ec4\u7684\u6700\u5927\u548c"},"content":{"rendered":"<p>\u8f93\u5165\u4e00\u4e2a\u6574\u578b\u6570\u7ec4\uff0c\u6570\u7ec4\u4e2d\u7684\u4e00\u4e2a\u6216\u8fde\u7eed\u591a\u4e2a\u6574\u6570\u7ec4\u6210\u4e00\u4e2a\u5b50\u6570\u7ec4\u3002\u6c42\u6240\u6709\u5b50\u6570\u7ec4\u7684\u548c\u7684\u6700\u5927\u503c\u3002<\/p>\n<p>\u8981\u6c42\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(n)\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u793a\u4f8b1:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> nums = [-2,1,-3,4,-1,2,1,-5,4]\n\n<strong>\u8f93\u51fa:<\/strong> 6\n\n<strong>\u89e3\u91ca:<\/strong>&nbsp;\u8fde\u7eed\u5b50\u6570\u7ec4&nbsp;[4,-1,2,1] \u7684\u548c\u6700\u5927\uff0c\u4e3a&nbsp;6\u3002<\/pre>\n<p>&nbsp;<\/p>\n<p><strong>\u63d0\u793a\uff1a<\/strong><\/p>\n<ul>\n<li><code>1 &lt;=&nbsp;arr.length &lt;= 10^5<\/code><\/li>\n<li><code>-100 &lt;= arr[i] &lt;= 100<\/code><\/li>\n<\/ul>\n<p>\u6ce8\u610f\uff1a\u672c\u9898\u4e0e\u4e3b\u7ad9 53 \u9898\u76f8\u540c\uff1a<a href=\"https:\/\/leetcode-cn.com\/problems\/maximum-subarray\/\">https:\/\/leetcode-cn.com\/problems\/maximum-subarray\/<\/a><\/p>\n<p>&nbsp;<\/p>\n<p>**\u96be\u5ea6**: Easy<\/p>\n<p>**\u6807\u7b7e**: \u5206\u6cbb\u7b97\u6cd5\u3001 \u52a8\u6001\u89c4\u5212\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\uff1a88 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8646.93% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a23.3 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e865.02% \u7684\u7528\u6237\n\u89e3\u9898\u601d\u8def\uff1a\n    \u52a8\u6001\u89c4\u5212\n\"\"\"\nclass Solution:\n    def maxSubArray(self, nums: List[int]) -&gt; int:\n        n = len(nums)\n        if n == 0:\n            return 0\n\n        dp = [[] for _ in range(n)]\n\n        dp[0] = nums[0]\n        for i in range(1, n):\n            dp[i] = max(dp[i-1] + nums[i], nums[i])\n        return max(dp)\n\n\n\"\"\"\n\u6267\u884c\u7528\u65f6\uff1a72 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8686.48% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a17.6 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8670.63% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u540c\u52a8\u6001\u89c4\u5212\uff0c\u4f46\u4e0d\u91c7\u7528\u8bb0\u5f55\u7684\u65b9\u5f0f\uff0c\u800c\u662f\u66f4\u65b0\u6700\u5927\u548c.\n\"\"\"\nclass Solution:\n    def maxSubArray(self, nums: List[int]) -&gt; int:\n        n = len(nums)\n        if n == 0:\n            return 0\n        max_ = nums[0]\n        record = nums[0]\n        for i in range(1, n):\n            record = max(record+nums[i], nums[i])\n            if record &gt; max_:\n                max_ = record\n        return max_<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u8f93\u5165\u4e00\u4e2a\u6574\u578b\u6570\u7ec4\uff0c\u6570\u7ec4\u4e2d\u7684\u4e00\u4e2a\u6216\u8fde\u7eed\u591a\u4e2a\u6574\u6570\u7ec4\u6210\u4e00\u4e2a\u5b50\u6570\u7ec4\u3002\u6c42\u6240\u6709\u5b50\u6570\u7ec4\u7684\u548c\u7684\u6700\u5927\u503c\u3002 \u8981\u6c42\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(n&#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\/489"}],"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=489"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/489\/revisions"}],"predecessor-version":[{"id":490,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/489\/revisions\/490"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=489"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=489"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=489"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}