{"id":323,"date":"2020-09-26T10:25:53","date_gmt":"2020-09-26T02:25:53","guid":{"rendered":"http:\/\/39.96.58.60\/?p=323"},"modified":"2022-10-18T16:39:50","modified_gmt":"2022-10-18T08:39:50","slug":"leetcode-122-%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-ii","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=323","title":{"rendered":"Leetcode 122. \u4e70\u5356\u80a1\u7968\u7684\u6700\u4f73\u65f6\u673a II"},"content":{"rendered":"

\u7ed9\u5b9a\u4e00\u4e2a\u6570\u7ec4\uff0c\u5b83\u7684\u7b2c i<\/em> \u4e2a\u5143\u7d20\u662f\u4e00\u652f\u7ed9\u5b9a\u80a1\u7968\u7b2c i<\/em> \u5929\u7684\u4ef7\u683c\u3002<\/p>\n

\u8bbe\u8ba1\u4e00\u4e2a\u7b97\u6cd5\u6765\u8ba1\u7b97\u4f60\u6240\u80fd\u83b7\u53d6\u7684\u6700\u5927\u5229\u6da6\u3002\u4f60\u53ef\u4ee5\u5c3d\u53ef\u80fd\u5730\u5b8c\u6210\u66f4\u591a\u7684\u4ea4\u6613\uff08\u591a\u6b21\u4e70\u5356\u4e00\u652f\u80a1\u7968\uff09\u3002<\/p>\n

\u6ce8\u610f\uff1a<\/strong>\u4f60\u4e0d\u80fd\u540c\u65f6\u53c2\u4e0e\u591a\u7b14\u4ea4\u6613\uff08\u4f60\u5fc5\u987b\u5728\u518d\u6b21\u8d2d\u4e70\u524d\u51fa\u552e\u6389\u4e4b\u524d\u7684\u80a1\u7968\uff09\u3002<\/p>\n

 <\/p>\n

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

\u8f93\u5165:<\/strong> [7,1,5,3,6,4]\n\n\u8f93\u51fa:<\/strong> 7\n\n\u89e3\u91ca:<\/strong> \u5728\u7b2c 2 \u5929\uff08\u80a1\u7968\u4ef7\u683c = 1\uff09\u7684\u65f6\u5019\u4e70\u5165\uff0c\u5728\u7b2c 3 \u5929\uff08\u80a1\u7968\u4ef7\u683c = 5\uff09\u7684\u65f6\u5019\u5356\u51fa, \u8fd9\u7b14\u4ea4\u6613\u6240\u80fd\u83b7\u5f97\u5229\u6da6 = 5-1 = 4 \u3002\n\n     \u968f\u540e\uff0c\u5728\u7b2c 4 \u5929\uff08\u80a1\u7968\u4ef7\u683c = 3\uff09\u7684\u65f6\u5019\u4e70\u5165\uff0c\u5728\u7b2c 5 \u5929\uff08\u80a1\u7968\u4ef7\u683c = 6\uff09\u7684\u65f6\u5019\u5356\u51fa, \u8fd9\u7b14\u4ea4\u6613\u6240\u80fd\u83b7\u5f97\u5229\u6da6 = 6-3 = 3 \u3002\n\n<\/pre>\n
\u793a\u4f8b 2:<\/strong><\/p>\n
\u8f93\u5165:<\/strong> [1,2,3,4,5]\n\n\u8f93\u51fa:<\/strong> 4\n\n\u89e3\u91ca:<\/strong> \u5728\u7b2c 1 \u5929\uff08\u80a1\u7968\u4ef7\u683c = 1\uff09\u7684\u65f6\u5019\u4e70\u5165\uff0c\u5728\u7b2c 5 \u5929 \uff08\u80a1\u7968\u4ef7\u683c = 5\uff09\u7684\u65f6\u5019\u5356\u51fa, \u8fd9\u7b14\u4ea4\u6613\u6240\u80fd\u83b7\u5f97\u5229\u6da6 = 5-1 = 4 \u3002\n\n     \u6ce8\u610f\u4f60\u4e0d\u80fd\u5728\u7b2c 1 \u5929\u548c\u7b2c 2 \u5929\u63a5\u8fde\u8d2d\u4e70\u80a1\u7968\uff0c\u4e4b\u540e\u518d\u5c06\u5b83\u4eec\u5356\u51fa\u3002\n\n     \u56e0\u4e3a\u8fd9\u6837\u5c5e\u4e8e\u540c\u65f6\u53c2\u4e0e\u4e86\u591a\u7b14\u4ea4\u6613\uff0c\u4f60\u5fc5\u987b\u5728\u518d\u6b21\u8d2d\u4e70\u524d\u51fa\u552e\u6389\u4e4b\u524d\u7684\u80a1\u7968\u3002\n\n<\/pre>\n
\u793a\u4f8b 3:<\/strong><\/p>\n
\u8f93\u5165:<\/strong> [7,6,4,3,1]\n\n\u8f93\u51fa:<\/strong> 0\n\n\u89e3\u91ca:<\/strong> \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b, \u6ca1\u6709\u4ea4\u6613\u5b8c\u6210, \u6240\u4ee5\u6700\u5927\u5229\u6da6\u4e3a 0\u3002<\/pre>\n
 <\/p>\n
\u63d0\u793a\uff1a<\/strong><\/p>\n
    \n
  • 1 <= prices.length <= 3 * 10 ^ 4<\/code><\/li>\n
  • 0 <= prices[i] <= 10 ^ 4<\/code><\/li>\n<\/ul>\n
    **\u96be\u5ea6**: Easy<\/p>\n
    **\u6807\u7b7e**: \u8d2a\u5fc3\u7b97\u6cd5\u3001 \u6570\u7ec4\u3001<\/p>\n
    \n
    \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\u4e8639.51% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a15 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8658.55% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u8d2a\u5fc3\u7b97\u6cd5\n    \u6bcf\u6b21\u53ea\u6c42\u5f53\u524d\u5c40\u90e8\u6700\u4f18\u89e3\u3002\n    \u6bcf\u5f53\u80a1\u4ef7\u4e0a\u5347\u65f6\uff0c\u5c31\u5c06\u4e0a\u5347\u7684\u5e45\u5ea6\u8ba1\u5165\u603b\u5229\u6da6\uff0c \u6700\u7ec8\u5f97\u5230\u7684\u4fbf\u662f\u6700\u5927\u603b\u5229\u6da6\n\"\"\"\nclass Solution:\n    def maxProfit(self, prices: List[int]) -> int:\n        n = len(prices)\n        result = 0\n        for i in range(n-1):\n            result += max(prices[i + 1] - prices[i], 0)\n        return result<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
    \u7ed9\u5b9a\u4e00\u4e2a\u6570\u7ec4\uff0c\u5b83\u7684\u7b2c i \u4e2a\u5143\u7d20\u662f\u4e00\u652f\u7ed9\u5b9a\u80a1\u7968\u7b2c i \u5929\u7684\u4ef7\u683c\u3002 \u8bbe\u8ba1\u4e00\u4e2a\u7b97\u6cd5\u6765\u8ba1\u7b97\u4f60\u6240\u80fd\u83b7\u53d6\u7684\u6700\u5927…<\/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\/323"}],"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=323"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/323\/revisions"}],"predecessor-version":[{"id":324,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/323\/revisions\/324"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=323"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}