{"id":653,"date":"2020-09-26T11:07:37","date_gmt":"2020-09-26T03:07:37","guid":{"rendered":"http:\/\/39.96.58.60\/?p=653"},"modified":"2022-10-18T16:38:24","modified_gmt":"2022-10-18T08:38:24","slug":"leetcode-657-%e6%9c%ba%e5%99%a8%e4%ba%ba%e8%83%bd%e5%90%a6%e8%bf%94%e5%9b%9e%e5%8e%9f%e7%82%b9","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=653","title":{"rendered":"Leetcode 657. \u673a\u5668\u4eba\u80fd\u5426\u8fd4\u56de\u539f\u70b9"},"content":{"rendered":"<p>\u5728\u4e8c\u7ef4\u5e73\u9762\u4e0a\uff0c\u6709\u4e00\u4e2a\u673a\u5668\u4eba\u4ece\u539f\u70b9 (0, 0) \u5f00\u59cb\u3002\u7ed9\u51fa\u5b83\u7684\u79fb\u52a8\u987a\u5e8f\uff0c\u5224\u65ad\u8fd9\u4e2a\u673a\u5668\u4eba\u5728\u5b8c\u6210\u79fb\u52a8\u540e\u662f\u5426\u5728<strong>&nbsp;(0, 0) \u5904\u7ed3\u675f<\/strong>\u3002<\/p>\n<p>\u79fb\u52a8\u987a\u5e8f\u7531\u5b57\u7b26\u4e32\u8868\u793a\u3002\u5b57\u7b26 move[i] \u8868\u793a\u5176\u7b2c i \u6b21\u79fb\u52a8\u3002\u673a\u5668\u4eba\u7684\u6709\u6548\u52a8\u4f5c\u6709&nbsp;<code>R<\/code>\uff08\u53f3\uff09\uff0c<code>L<\/code>\uff08\u5de6\uff09\uff0c<code>U<\/code>\uff08\u4e0a\uff09\u548c <code>D<\/code>\uff08\u4e0b\uff09\u3002\u5982\u679c\u673a\u5668\u4eba\u5728\u5b8c\u6210\u6240\u6709\u52a8\u4f5c\u540e\u8fd4\u56de\u539f\u70b9\uff0c\u5219\u8fd4\u56de true\u3002\u5426\u5219\uff0c\u8fd4\u56de false\u3002<\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong>\u673a\u5668\u4eba\u201c\u9762\u671d\u201d\u7684\u65b9\u5411\u65e0\u5173\u7d27\u8981\u3002 \u201cR\u201d \u5c06\u59cb\u7ec8\u4f7f\u673a\u5668\u4eba\u5411\u53f3\u79fb\u52a8\u4e00\u6b21\uff0c\u201cL\u201d \u5c06\u59cb\u7ec8\u5411\u5de6\u79fb\u52a8\u7b49\u3002\u6b64\u5916\uff0c\u5047\u8bbe\u6bcf\u6b21\u79fb\u52a8\u673a\u5668\u4eba\u7684\u79fb\u52a8\u5e45\u5ea6\u76f8\u540c\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u793a\u4f8b 1:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> \"UD\"\n\n<strong>\u8f93\u51fa:<\/strong> true\n\n<strong>\u89e3\u91ca\uff1a<\/strong>\u673a\u5668\u4eba\u5411\u4e0a\u79fb\u52a8\u4e00\u6b21\uff0c\u7136\u540e\u5411\u4e0b\u79fb\u52a8\u4e00\u6b21\u3002\u6240\u6709\u52a8\u4f5c\u90fd\u5177\u6709\u76f8\u540c\u7684\u5e45\u5ea6\uff0c\u56e0\u6b64\u5b83\u6700\u7ec8\u56de\u5230\u5b83\u5f00\u59cb\u7684\u539f\u70b9\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u8fd4\u56de true\u3002<\/pre>\n<p><strong>\u793a\u4f8b 2:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> \"LL\"\n\n<strong>\u8f93\u51fa:<\/strong> false\n\n<strong>\u89e3\u91ca\uff1a<\/strong>\u673a\u5668\u4eba\u5411\u5de6\u79fb\u52a8\u4e24\u6b21\u3002\u5b83\u6700\u7ec8\u4f4d\u4e8e\u539f\u70b9\u7684\u5de6\u4fa7\uff0c\u8ddd\u539f\u70b9\u6709\u4e24\u6b21 \u201c\u79fb\u52a8\u201d \u7684\u8ddd\u79bb\u3002\u6211\u4eec\u8fd4\u56de false\uff0c\u56e0\u4e3a\u5b83\u5728\u79fb\u52a8\u7ed3\u675f\u65f6\u6ca1\u6709\u8fd4\u56de\u539f\u70b9\u3002<\/pre>\n<p>**\u96be\u5ea6**: Easy<\/p>\n<p>**\u6807\u7b7e**: \u5b57\u7b26\u4e32\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\uff1a196 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e865.21% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a13.6 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8686.94% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u6a21\u62df\u673a\u5668\u4eba\u8fd0\u52a8\n\"\"\"\nclass Solution:\n    def judgeCircle(self, moves: str) -&gt; bool:\n        dic = {'U': [0, 1], # \u8fd0\u52a8\u65b9\u5411\u5bf9\u5e94\u7684\u5750\u6807\u8fd0\u52a8\n               'D': [0, -1],\n               'L': [-1, 0],\n               'R': [1, 0]}\n        start = [0, 0]  # \u8d77\u59cb\u70b9\n        for move in moves:      # \u5f00\u59cb\u8fd0\u52a8\n            start = [i+j for i,j in zip(start, dic[move])]  # \u6bcf\u6b21\u8fd0\u52a8\u540e\u7684\u5750\u6807\n        if start == [0, 0]: # \u5224\u65ad\u662f\u5426\u56de\u5230\u539f\u70b9\n            return True\n        return False\n\n\n\"\"\"\n\u6267\u884c\u7528\u65f6\uff1a40 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8696.39% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a13.7 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8669.83% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u76f4\u63a5\u7edf\u8ba1\u7ed9\u5b9a\u5b57\u7b26\u4e32\u4e2d\uff0c\u5404\u65b9\u5411\u79fb\u52a8\u7684\u6b21\u6570\n\"\"\"\nclass Solution:\n    def judgeCircle(self, moves: str) -&gt; bool:\n        return moves.count('L')==moves.count('R') and moves.count('U')==moves.count('D')\n<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u4e8c\u7ef4\u5e73\u9762\u4e0a\uff0c\u6709\u4e00\u4e2a\u673a\u5668\u4eba\u4ece\u539f\u70b9 (0, 0) \u5f00\u59cb\u3002\u7ed9\u51fa\u5b83\u7684\u79fb\u52a8\u987a\u5e8f\uff0c\u5224\u65ad\u8fd9\u4e2a\u673a\u5668\u4eba\u5728\u5b8c\u6210\u79fb\u52a8\u540e\u662f\u5426\u5728&#038;nb&#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\/653"}],"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=653"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/653\/revisions"}],"predecessor-version":[{"id":654,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/653\/revisions\/654"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=653"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=653"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=653"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}