{"id":321,"date":"2020-09-26T10:25:39","date_gmt":"2020-09-26T02:25:39","guid":{"rendered":"http:\/\/39.96.58.60\/?p=321"},"modified":"2022-10-18T16:39:50","modified_gmt":"2022-10-18T08:39:50","slug":"leetcode-121-%e4%b9%b0%e5%8d%96%e8%82%a1%e7%a5%a8%e7%9a%84%e6%9c%80%e4%bd%b3%e6%97%b6%e6%9c%ba","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=321","title":{"rendered":"Leetcode 121. \u4e70\u5356\u80a1\u7968\u7684\u6700\u4f73\u65f6\u673a"},"content":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u6570\u7ec4\uff0c\u5b83\u7684\u7b2c&nbsp;<em>i<\/em> \u4e2a\u5143\u7d20\u662f\u4e00\u652f\u7ed9\u5b9a\u80a1\u7968\u7b2c <em>i<\/em> \u5929\u7684\u4ef7\u683c\u3002<\/p>\n<p>\u5982\u679c\u4f60\u6700\u591a\u53ea\u5141\u8bb8\u5b8c\u6210\u4e00\u7b14\u4ea4\u6613\uff08\u5373\u4e70\u5165\u548c\u5356\u51fa\u4e00\u652f\u80a1\u7968\u4e00\u6b21\uff09\uff0c\u8bbe\u8ba1\u4e00\u4e2a\u7b97\u6cd5\u6765\u8ba1\u7b97\u4f60\u6240\u80fd\u83b7\u53d6\u7684\u6700\u5927\u5229\u6da6\u3002<\/p>\n<p>\u6ce8\u610f\uff1a\u4f60\u4e0d\u80fd\u5728\u4e70\u5165\u80a1\u7968\u524d\u5356\u51fa\u80a1\u7968\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u793a\u4f8b 1:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> [7,1,5,3,6,4]\n\n<strong>\u8f93\u51fa:<\/strong> 5\n\n<strong>\u89e3\u91ca: <\/strong>\u5728\u7b2c 2 \u5929\uff08\u80a1\u7968\u4ef7\u683c = 1\uff09\u7684\u65f6\u5019\u4e70\u5165\uff0c\u5728\u7b2c 5 \u5929\uff08\u80a1\u7968\u4ef7\u683c = 6\uff09\u7684\u65f6\u5019\u5356\u51fa\uff0c\u6700\u5927\u5229\u6da6 = 6-1 = 5 \u3002\n\n     \u6ce8\u610f\u5229\u6da6\u4e0d\u80fd\u662f 7-1 = 6, \u56e0\u4e3a\u5356\u51fa\u4ef7\u683c\u9700\u8981\u5927\u4e8e\u4e70\u5165\u4ef7\u683c\uff1b\u540c\u65f6\uff0c\u4f60\u4e0d\u80fd\u5728\u4e70\u5165\u524d\u5356\u51fa\u80a1\u7968\u3002\n\n<\/pre>\n<p><strong>\u793a\u4f8b 2:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> [7,6,4,3,1]\n\n<strong>\u8f93\u51fa:<\/strong> 0\n\n<strong>\u89e3\u91ca: <\/strong>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b, \u6ca1\u6709\u4ea4\u6613\u5b8c\u6210, \u6240\u4ee5\u6700\u5927\u5229\u6da6\u4e3a 0\u3002\n\n<\/pre>\n<p>**\u96be\u5ea6**: Easy<\/p>\n<p>**\u6807\u7b7e**: \u6570\u7ec4\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\uff1a40 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8695.92% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a14.6 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8641.17% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u8bb0\u5f55\u5f53\u524d\u6700\u5c0f\u503c\uff0c\u4f5c\u4e3a\u4e70\u5165\u65f6\u673a\uff0c\u4f9d\u6b21\u66f4\u65b0\u4e70\u5165\u65f6\u673a\u5e76\u8ba1\u7b97\u5229\u6da6\n\"\"\"\nclass Solution:\n    def maxProfit(self, prices: List[int]) -&gt; int:\n        if len(prices) &lt; 2:\n            return 0\n        buy = prices[0]\n        profit = 0\n        for price in prices[1:]:\n            if buy &gt; price:\n                buy = price\n            else:\n                profit = max((price-buy), profit)\n        return profit<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u6570\u7ec4\uff0c\u5b83\u7684\u7b2c&nbsp;i \u4e2a\u5143\u7d20\u662f\u4e00\u652f\u7ed9\u5b9a\u80a1\u7968\u7b2c i \u5929\u7684\u4ef7\u683c\u3002 \u5982\u679c\u4f60\u6700\u591a\u53ea\u5141\u8bb8\u5b8c\u6210\u4e00\u7b14\u4ea4\u6613\uff08\u5373\u4e70&#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\/321"}],"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=321"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/321\/revisions"}],"predecessor-version":[{"id":322,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/321\/revisions\/322"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=321"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=321"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}