{"id":541,"date":"2020-09-26T10:53:45","date_gmt":"2020-09-26T02:53:45","guid":{"rendered":"http:\/\/39.96.58.60\/?p=541"},"modified":"2022-10-18T16:38:54","modified_gmt":"2022-10-18T08:38:54","slug":"leetcode-746-%e4%bd%bf%e7%94%a8%e6%9c%80%e5%b0%8f%e8%8a%b1%e8%b4%b9%e7%88%ac%e6%a5%bc%e6%a2%af","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=541","title":{"rendered":"Leetcode 746. \u4f7f\u7528\u6700\u5c0f\u82b1\u8d39\u722c\u697c\u68af"},"content":{"rendered":"<p>\u6570\u7ec4\u7684\u6bcf\u4e2a\u7d22\u5f15\u4f5c\u4e3a\u4e00\u4e2a\u9636\u68af\uff0c\u7b2c&nbsp;<code>i<\/code>\u4e2a\u9636\u68af\u5bf9\u5e94\u7740\u4e00\u4e2a\u975e\u8d1f\u6570\u7684\u4f53\u529b\u82b1\u8d39\u503c&nbsp;<code>cost[i]<\/code>(\u7d22\u5f15\u4ece0\u5f00\u59cb)\u3002<\/p>\n<p>\u6bcf\u5f53\u4f60\u722c\u4e0a\u4e00\u4e2a\u9636\u68af\u4f60\u90fd\u8981\u82b1\u8d39\u5bf9\u5e94\u7684\u4f53\u529b\u82b1\u8d39\u503c\uff0c\u7136\u540e\u4f60\u53ef\u4ee5\u9009\u62e9\u7ee7\u7eed\u722c\u4e00\u4e2a\u9636\u68af\u6216\u8005\u722c\u4e24\u4e2a\u9636\u68af\u3002<\/p>\n<p>\u60a8\u9700\u8981\u627e\u5230\u8fbe\u5230\u697c\u5c42\u9876\u90e8\u7684\u6700\u4f4e\u82b1\u8d39\u3002\u5728\u5f00\u59cb\u65f6\uff0c\u4f60\u53ef\u4ee5\u9009\u62e9\u4ece\u7d22\u5f15\u4e3a 0 \u6216 1 \u7684\u5143\u7d20\u4f5c\u4e3a\u521d\u59cb\u9636\u68af\u3002<\/p>\n<p><strong>\u793a\u4f8b&nbsp;1:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> cost = [10, 15, 20]\n\n<strong>\u8f93\u51fa:<\/strong> 15\n\n<strong>\u89e3\u91ca:<\/strong> \u6700\u4f4e\u82b1\u8d39\u662f\u4ececost[1]\u5f00\u59cb\uff0c\u7136\u540e\u8d70\u4e24\u6b65\u5373\u53ef\u5230\u9636\u68af\u9876\uff0c\u4e00\u5171\u82b1\u8d3915\u3002\n\n<\/pre>\n<p><strong>&nbsp;\u793a\u4f8b 2:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> cost = [1, 100, 1, 1, 1, 100, 1, 1, 100, 1]\n\n<strong>\u8f93\u51fa:<\/strong> 6\n\n<strong>\u89e3\u91ca:<\/strong> \u6700\u4f4e\u82b1\u8d39\u65b9\u5f0f\u662f\u4ececost[0]\u5f00\u59cb\uff0c\u9010\u4e2a\u7ecf\u8fc7\u90a3\u4e9b1\uff0c\u8df3\u8fc7cost[3]\uff0c\u4e00\u5171\u82b1\u8d396\u3002\n\n<\/pre>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<ol>\n<li><code>cost<\/code>&nbsp;\u7684\u957f\u5ea6\u5c06\u4f1a\u5728&nbsp;<code>[2, 1000]<\/code>\u3002<\/li>\n<li>\u6bcf\u4e00\u4e2a&nbsp;<code>cost[i]<\/code> \u5c06\u4f1a\u662f\u4e00\u4e2aInteger\u7c7b\u578b\uff0c\u8303\u56f4\u4e3a&nbsp;<code>[0, 999]<\/code>\u3002<\/li>\n<\/ol>\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\uff1a68 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8691.41% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a13.6 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8682.66% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u52a8\u6001\u89c4\u5212\n    \u521d\u59cb\u70b9\u53ef\u4ee5\u662f\u7b2c\u4e00\u4e2a\u6216\u8005\u7b2c\u4e8c\u4e2a\uff0c\u5355\u72ec\u5904\u7406\u8fd9\u79cd\u60c5\u51b5\n    \u5bf9\u4e8e\u5927\u4e8e\u4e09\u7684\u70b9\uff0c\u5176\u53ef\u4ee5\u7531\u7b2c\u4e8c\u4e2a+1\uff0c\u4e5f\u53ef\u4ee5\u7531\u7b2c\u4e00\u4e2a+2\uff0c\u53d6\u6700\u5c0f\u503c\u5373\u53ef\n    dp[i] = min(dp[i-1], dp[i-2])\n\n\"\"\"\n\nclass Solution:\n    def minCostClimbingStairs(self, cost: List[int]) -&gt; int:\n        n = len(cost)\n        if n == 1:      # \u5bf9\u4e8e\u5355\u4e2a\u5143\u7d20\uff0c\u76f4\u63a5\u8fd4\u56de\n            return cost[0]\n        if n == 2:      # \u4e24\u4e2a\u5143\u7d20\uff0c\u53ef\u7ecf\u7b2c\u4e00\u4e2a\uff0c\u76f4\u63a5\u5230\u9876\uff1b\u4e5f\u53ef\u7ecf\u7b2c\u4e8c\u4e2a\u76f4\u63a5\u5230\u9876\n            return min(cost[0],cost[1])\n\n        dp = [[] for _ in range(n)]\n        dp[0] = cost[0]\n        dp[1] = cost[1]\n        for i in range(2, n):\n            dp[i] = min(dp[i-1], dp[i-2]) + cost[i] # \u5927\u4e8e\u4e09\u7684\u5143\u7d20\uff0c\u4f9d\u8d56\u4e8e\u524d\u4e00\u4e2a\u548c\u524d\u4e24\u4e2a\u5143\u7d20\u7684\u503c\uff0c\u6700\u540e\u52a0\u4e0a\u672c\u8eab\u7684\u503c\n        cost = min(dp[-1], dp[-2])  # \u6700\u540e\u9700\u8981\u5904\u7406\uff0c\u53ef\u7ecf\u5012\u6570\u7b2c\u4e00\u4e2a\u5143\u7d20\u5230\u9876\uff0c\u4e5f\u53ef\u7ecf\u5012\u6570\u7b2c\u4e8c\u4e2a\u5143\u7d20\u5230\u9876\n\n        return cost<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u6570\u7ec4\u7684\u6bcf\u4e2a\u7d22\u5f15\u4f5c\u4e3a\u4e00\u4e2a\u9636\u68af\uff0c\u7b2c&nbsp;i\u4e2a\u9636\u68af\u5bf9\u5e94\u7740\u4e00\u4e2a\u975e\u8d1f\u6570\u7684\u4f53\u529b\u82b1\u8d39\u503c&nbsp;cost[i](\u7d22\u5f15&#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\/541"}],"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=541"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/541\/revisions"}],"predecessor-version":[{"id":542,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/541\/revisions\/542"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=541"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=541"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=541"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}