{"id":551,"date":"2020-09-26T10:55:22","date_gmt":"2020-09-26T02:55:22","guid":{"rendered":"http:\/\/39.96.58.60\/?p=551"},"modified":"2022-10-18T16:38:54","modified_gmt":"2022-10-18T08:38:54","slug":"leetcode-64-%e6%9c%80%e5%b0%8f%e8%b7%af%e5%be%84%e5%92%8c","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=551","title":{"rendered":"Leetcode 64. \u6700\u5c0f\u8def\u5f84\u548c"},"content":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u5305\u542b\u975e\u8d1f\u6574\u6570\u7684 <em>m<\/em>&nbsp;x&nbsp;<em>n<\/em>&nbsp;\u7f51\u683c\uff0c\u8bf7\u627e\u51fa\u4e00\u6761\u4ece\u5de6\u4e0a\u89d2\u5230\u53f3\u4e0b\u89d2\u7684\u8def\u5f84\uff0c\u4f7f\u5f97\u8def\u5f84\u4e0a\u7684\u6570\u5b57\u603b\u548c\u4e3a\u6700\u5c0f\u3002<\/p>\n<p><strong>\u8bf4\u660e\uff1a<\/strong>\u6bcf\u6b21\u53ea\u80fd\u5411\u4e0b\u6216\u8005\u5411\u53f3\u79fb\u52a8\u4e00\u6b65\u3002<\/p>\n<p><strong>\u793a\u4f8b:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong>\n\n[\n\n&nbsp; [1,3,1],\n\n  [1,5,1],\n\n  [4,2,1]\n\n]\n\n<strong>\u8f93\u51fa:<\/strong> 7\n\n<strong>\u89e3\u91ca:<\/strong> \u56e0\u4e3a\u8def\u5f84 1\u21923\u21921\u21921\u21921 \u7684\u603b\u548c\u6700\u5c0f\u3002\n\n<\/pre>\n<p>**\u96be\u5ea6**: Medium<\/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\uff1a44 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8699.38% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a15 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e868.33% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u8ba1\u7b97\u6bcf\u4e2a\u70b9 \u4e0a\u4fa7\u4e0e\u5de6\u4fa7\u7684\u6700\u5c0f\u503c\uff0c\u4f5c\u4e3a\u5f53\u524d\u70b9\u5230\u5de6\u4e0a\u70b9\u7684\u6700\u77ed\u8ddd\u79bb\u3002\n    \u4f9d\u6b21\u8ba1\u7b97\uff0c\u76f4\u5230\u904d\u5386\u5b8c\u6574\u4e2a\u8def\u5f84\u77e9\u9635\n\"\"\"\n\nclass Solution:\n    def minPathSum(self, grid: List[List[int]]) -&gt; int:\n        m = len(grid[0])\n        n = len(grid)\n\n        for i in range(n):\n            if i &gt;0:\n                grid[i][0] = grid[i-1][0] + grid[i][0]\n            else:\n                grid[i][0] = 0 + grid[i][0]\n\n        for j in range(1, m):\n            grid[0][j] = grid[0][j-1] + grid[0][j]\n\n        if m &gt; 1:\n            for i in range(1, n):\n                if n &gt;1:\n                    for j in range(1, m):\n                        grid[i][j] = min(grid[i-1][j], grid[i][j-1])+grid[i][j]\n        return grid[n-1][m-1]\n\n\n<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u5305\u542b\u975e\u8d1f\u6574\u6570\u7684 m&nbsp;x&nbsp;n&nbsp;\u7f51\u683c\uff0c\u8bf7\u627e\u51fa\u4e00\u6761\u4ece\u5de6\u4e0a\u89d2\u5230\u53f3\u4e0b\u89d2\u7684\u8def\u5f84\uff0c\u4f7f\u5f97&#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\/551"}],"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=551"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/551\/revisions"}],"predecessor-version":[{"id":552,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/551\/revisions\/552"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=551"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=551"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}