{"id":317,"date":"2020-09-26T10:25:11","date_gmt":"2020-09-26T02:25:11","guid":{"rendered":"http:\/\/39.96.58.60\/?p=317"},"modified":"2022-10-18T16:43:06","modified_gmt":"2022-10-18T08:43:06","slug":"leetcode-682-%e6%a3%92%e7%90%83%e6%af%94%e8%b5%9b","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=317","title":{"rendered":"Leetcode 682. \u68d2\u7403\u6bd4\u8d5b"},"content":{"rendered":"<p>\u4f60\u73b0\u5728\u662f\u68d2\u7403\u6bd4\u8d5b\u8bb0\u5f55\u5458\u3002<br \/>\n\u7ed9\u5b9a\u4e00\u4e2a\u5b57\u7b26\u4e32\u5217\u8868\uff0c\u6bcf\u4e2a\u5b57\u7b26\u4e32\u53ef\u4ee5\u662f\u4ee5\u4e0b\u56db\u79cd\u7c7b\u578b\u4e4b\u4e00\uff1a<\/p>\n<p>1.<code>\u6574\u6570<\/code>\uff08\u4e00\u8f6e\u7684\u5f97\u5206\uff09\uff1a\u76f4\u63a5\u8868\u793a\u60a8\u5728\u672c\u8f6e\u4e2d\u83b7\u5f97\u7684\u79ef\u5206\u6570\u3002<\/p>\n<p>2. <code>\"+\"<\/code>\uff08\u4e00\u8f6e\u7684\u5f97\u5206\uff09\uff1a\u8868\u793a\u672c\u8f6e\u83b7\u5f97\u7684\u5f97\u5206\u662f\u524d\u4e24\u8f6e<code>\u6709\u6548<\/code>&nbsp;\u56de\u5408\u5f97\u5206\u7684\u603b\u548c\u3002<\/p>\n<p>3. <code>\"D\"<\/code>\uff08\u4e00\u8f6e\u7684\u5f97\u5206\uff09\uff1a\u8868\u793a\u672c\u8f6e\u83b7\u5f97\u7684\u5f97\u5206\u662f\u524d\u4e00\u8f6e<code>\u6709\u6548<\/code>&nbsp;\u56de\u5408\u5f97\u5206\u7684\u4e24\u500d\u3002<\/p>\n<p>4. <code>\"C\"<\/code>\uff08\u4e00\u4e2a\u64cd\u4f5c\uff0c\u8fd9\u4e0d\u662f\u4e00\u4e2a\u56de\u5408\u7684\u5206\u6570\uff09\uff1a\u8868\u793a\u60a8\u83b7\u5f97\u7684\u6700\u540e\u4e00\u4e2a<code>\u6709\u6548<\/code>&nbsp;\u56de\u5408\u7684\u5206\u6570\u662f\u65e0\u6548\u7684\uff0c\u5e94\u8be5\u88ab\u79fb\u9664\u3002<\/p>\n<p>\u6bcf\u4e00\u8f6e\u7684\u64cd\u4f5c\u90fd\u662f\u6c38\u4e45\u6027\u7684\uff0c\u53ef\u80fd\u4f1a\u5bf9\u524d\u4e00\u8f6e\u548c\u540e\u4e00\u8f6e\u4ea7\u751f\u5f71\u54cd\u3002<\/p>\n<p>\u4f60\u9700\u8981\u8fd4\u56de\u4f60\u5728\u6240\u6709\u56de\u5408\u4e2d\u5f97\u5206\u7684\u603b\u548c\u3002<\/p>\n<p><strong>\u793a\u4f8b 1:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> [\"5\",\"2\",\"C\",\"D\",\"+\"]\n\n<strong>\u8f93\u51fa:<\/strong> 30\n\n<strong>\u89e3\u91ca:<\/strong> \n\n\u7b2c1\u8f6e\uff1a\u4f60\u53ef\u4ee5\u5f97\u52305\u5206\u3002\u603b\u548c\u662f\uff1a5\u3002\n\n\u7b2c2\u8f6e\uff1a\u4f60\u53ef\u4ee5\u5f97\u52302\u5206\u3002\u603b\u548c\u662f\uff1a7\u3002\n\n\u64cd\u4f5c1\uff1a\u7b2c2\u8f6e\u7684\u6570\u636e\u65e0\u6548\u3002\u603b\u548c\u662f\uff1a5\u3002\n\n\u7b2c3\u8f6e\uff1a\u4f60\u53ef\u4ee5\u5f97\u523010\u5206\uff08\u7b2c2\u8f6e\u7684\u6570\u636e\u5df2\u88ab\u5220\u9664\uff09\u3002\u603b\u6570\u662f\uff1a15\u3002\n\n\u7b2c4\u8f6e\uff1a\u4f60\u53ef\u4ee5\u5f97\u52305 + 10 = 15\u5206\u3002\u603b\u6570\u662f\uff1a30\u3002\n\n<\/pre>\n<p><strong>\u793a\u4f8b 2:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> [\"5\",\"-2\",\"4\",\"C\",\"D\",\"9\",\"+\",\"+\"]\n\n<strong>\u8f93\u51fa:<\/strong> 27\n\n<strong>\u89e3\u91ca:<\/strong> \n\n\u7b2c1\u8f6e\uff1a\u4f60\u53ef\u4ee5\u5f97\u52305\u5206\u3002\u603b\u548c\u662f\uff1a5\u3002\n\n\u7b2c2\u8f6e\uff1a\u4f60\u53ef\u4ee5\u5f97\u5230-2\u5206\u3002\u603b\u6570\u662f\uff1a3\u3002\n\n\u7b2c3\u8f6e\uff1a\u4f60\u53ef\u4ee5\u5f97\u52304\u5206\u3002\u603b\u548c\u662f\uff1a7\u3002\n\n\u64cd\u4f5c1\uff1a\u7b2c3\u8f6e\u7684\u6570\u636e\u65e0\u6548\u3002\u603b\u6570\u662f\uff1a3\u3002\n\n\u7b2c4\u8f6e\uff1a\u4f60\u53ef\u4ee5\u5f97\u5230-4\u5206\uff08\u7b2c\u4e09\u8f6e\u7684\u6570\u636e\u5df2\u88ab\u5220\u9664\uff09\u3002\u603b\u548c\u662f\uff1a-1\u3002\n\n\u7b2c5\u8f6e\uff1a\u4f60\u53ef\u4ee5\u5f97\u52309\u5206\u3002\u603b\u6570\u662f\uff1a8\u3002\n\n\u7b2c6\u8f6e\uff1a\u4f60\u53ef\u4ee5\u5f97\u5230-4 + 9 = 5\u5206\u3002\u603b\u6570\u662f13\u3002\n\n\u7b2c7\u8f6e\uff1a\u4f60\u53ef\u4ee5\u5f97\u52309 + 5 = 14\u5206\u3002\u603b\u6570\u662f27\u3002\n\n<\/pre>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<ul>\n<li>\u8f93\u5165\u5217\u8868\u7684\u5927\u5c0f\u5c06\u4ecb\u4e8e1\u548c1000\u4e4b\u95f4\u3002<\/li>\n<li>\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u6574\u6570\u90fd\u5c06\u4ecb\u4e8e-30000\u548c30000\u4e4b\u95f4\u3002<\/li>\n<\/ul>\n<p>**\u96be\u5ea6**: Easy<\/p>\n<p>**\u6807\u7b7e**: \u6808\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\uff1a48 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8688.49% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a13.4 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8642.15% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u5177\u4f53\u5b9e\u73b0\u89c1\u4ee3\u7801\u6ce8\u91ca\n\"\"\"\nclass Solution:\n    def calPoints(self, ops: List[str]) -&gt; int:\n        record = []\n        for op in ops:\n            if op == '+':\n                record.append(sum(record[-2:])) # \u524d\u4e24\u8f6e\u5f97\u5206\u548c\n            elif op == 'D':\n                record.append(record[-1] * 2)   # \u524d\u4e00\u8f6e\u5f97\u5206\u76842\u500d\n            elif op == 'C':\n                record.pop()    # \u524d\u4e00\u8f6e\u5f97\u5206\u65e0\u6548\uff0c\u5254\u9664\n            else:\n                record.append(int(op))  # \u5f55\u5165\u5f97\u5206\n        return sum(record)<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u4f60\u73b0\u5728\u662f\u68d2\u7403\u6bd4\u8d5b\u8bb0\u5f55\u5458\u3002 \u7ed9\u5b9a\u4e00\u4e2a\u5b57\u7b26\u4e32\u5217\u8868\uff0c\u6bcf\u4e2a\u5b57\u7b26\u4e32\u53ef\u4ee5\u662f\u4ee5\u4e0b\u56db\u79cd\u7c7b\u578b\u4e4b\u4e00\uff1a 1.\u6574\u6570\uff08\u4e00\u8f6e\u7684\u5f97\u5206\uff09\uff1a\u76f4\u63a5&#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\/317"}],"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=317"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/317\/revisions"}],"predecessor-version":[{"id":318,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/317\/revisions\/318"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=317"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=317"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=317"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}