{"id":569,"date":"2020-09-26T10:58:42","date_gmt":"2020-09-26T02:58:42","guid":{"rendered":"http:\/\/39.96.58.60\/?p=569"},"modified":"2022-10-18T16:38:45","modified_gmt":"2022-10-18T08:38:45","slug":"leetcode-9-%e5%9b%9e%e6%96%87%e6%95%b0","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=569","title":{"rendered":"Leetcode 9. \u56de\u6587\u6570"},"content":{"rendered":"<p>\u5224\u65ad\u4e00\u4e2a\u6574\u6570\u662f\u5426\u662f\u56de\u6587\u6570\u3002\u56de\u6587\u6570\u662f\u6307\u6b63\u5e8f\uff08\u4ece\u5de6\u5411\u53f3\uff09\u548c\u5012\u5e8f\uff08\u4ece\u53f3\u5411\u5de6\uff09\u8bfb\u90fd\u662f\u4e00\u6837\u7684\u6574\u6570\u3002<\/p>\n<p><strong>\u793a\u4f8b 1:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> 121\n\n<strong>\u8f93\u51fa:<\/strong> true\n\n<\/pre>\n<p><strong>\u793a\u4f8b&nbsp;2:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> -121\n\n<strong>\u8f93\u51fa:<\/strong> false\n\n<strong>\u89e3\u91ca:<\/strong> \u4ece\u5de6\u5411\u53f3\u8bfb, \u4e3a -121 \u3002 \u4ece\u53f3\u5411\u5de6\u8bfb, \u4e3a 121- \u3002\u56e0\u6b64\u5b83\u4e0d\u662f\u4e00\u4e2a\u56de\u6587\u6570\u3002\n\n<\/pre>\n<p><strong>\u793a\u4f8b 3:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> 10\n\n<strong>\u8f93\u51fa:<\/strong> false\n\n<strong>\u89e3\u91ca:<\/strong> \u4ece\u53f3\u5411\u5de6\u8bfb, \u4e3a 01 \u3002\u56e0\u6b64\u5b83\u4e0d\u662f\u4e00\u4e2a\u56de\u6587\u6570\u3002\n\n<\/pre>\n<p><strong>\u8fdb\u9636:<\/strong><\/p>\n<p>\u4f60\u80fd\u4e0d\u5c06\u6574\u6570\u8f6c\u4e3a\u5b57\u7b26\u4e32\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u5417\uff1f<\/p>\n<p>**\u96be\u5ea6**: Easy<\/p>\n<p>**\u6807\u7b7e**: \u6570\u5b66\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\uff1a96 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8638.64% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a13.8 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8611.30% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u8fd9\u91cc\u6ca1\u6709\u5c06\u6570\u5b57\u8f6c\u5b57\u7b26\u4e32\u8fdb\u884c\u5224\u65ad\u3002\n    \u800c\u662f\u9996\u5148\u5bf9\u6570\u5b57\u8fdb\u884c\u4e86\u5224\u65ad\uff0c\u9650\u5236\u5728\u4e00\u4e2a\u8303\u56f4\u5185\uff0c\u7136\u540e\u5c06\u6570\u5b57\u7ffb\u8f6c\u540e\u8fdb\u884c\u5224\u65ad\u3002\n\"\"\"\nclass Solution:\n    def isPalindrome(self, x: int) -&gt; bool:\n        if x&lt;0 or x&gt;2147447412: # 2147447412 \u662f 2*31-1 \u5185\u6700\u5927\u7684\u56de\u6587\u6570\u3002\u8d1f\u6570 \u6309\u9898\u610f\u53ef\u77e5\u5747\u4e0d\u56de\u6587\n            return False\n        x_copy = x\n        num = 0\n        while x:                # \u7ffb\u8f6c\u6570\u5b57\n            num = num*10 + x%10\n            x = x\/\/10\n        if num == x_copy:\n            return True\n        else:\n            return False<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u5224\u65ad\u4e00\u4e2a\u6574\u6570\u662f\u5426\u662f\u56de\u6587\u6570\u3002\u56de\u6587\u6570\u662f\u6307\u6b63\u5e8f\uff08\u4ece\u5de6\u5411\u53f3\uff09\u548c\u5012\u5e8f\uff08\u4ece\u53f3\u5411\u5de6\uff09\u8bfb\u90fd\u662f\u4e00\u6837\u7684\u6574\u6570\u3002 \u793a\u4f8b 1: \u8f93\u5165: &#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\/569"}],"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=569"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/569\/revisions"}],"predecessor-version":[{"id":570,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/569\/revisions\/570"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=569"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=569"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=569"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}