{"id":757,"date":"2022-06-21T01:16:00","date_gmt":"2022-06-20T17:16:00","guid":{"rendered":"https:\/\/bigwer.cn\/?p=757"},"modified":"2023-08-31T16:21:03","modified_gmt":"2023-08-31T08:21:03","slug":"lc367-%e6%9c%89%e6%95%88%e7%9a%84%e5%ae%8c%e5%85%a8%e5%b9%b3%e6%96%b9%e6%95%b0","status":"publish","type":"post","link":"https:\/\/bigwer.cn\/index.php\/2022\/06\/21\/lc367-%e6%9c%89%e6%95%88%e7%9a%84%e5%ae%8c%e5%85%a8%e5%b9%b3%e6%96%b9%e6%95%b0\/","title":{"rendered":"lc367.\u6709\u6548\u7684\u5b8c\u5168\u5e73\u65b9\u6570"},"content":{"rendered":"<p><div class=\"has-toc have-toc\"><\/div><br \/>\n<a href=\"https:\/\/leetcode.cn\/problems\/valid-perfect-square\/\" target=\"_blank\"  rel=\"nofollow\" >367.\u6709\u6548\u7684\u5b8c\u5168\u5e73\u65b9\u6570<\/a><\/p>\n<blockquote>\n<p>\u7ed9\u5b9a\u4e00\u4e2a<strong>\u6b63\u6574\u6570<\/strong>num \uff0c\u7f16\u5199\u4e00\u4e2a\u51fd\u6570\uff0c\u5982\u679c<strong>num<\/strong>\u662f\u4e00\u4e2a\u5b8c\u5168\u5e73\u65b9\u6570\uff0c\u5219\u8fd4\u56de<strong>true<\/strong>\uff0c\u5426\u5219\u8fd4\u56de<strong>false<\/strong>\u3002<br \/>\n\u8fdb\u9636\uff1a<strong>\u4e0d\u8981<\/strong>\u4f7f\u7528\u4efb\u4f55\u5185\u7f6e\u7684\u5e93\u51fd\u6570\uff0c\u5982<strong>sqrt<\/strong>\u3002<\/p>\n<\/blockquote>\n<h3>\u793a\u4f8b1<\/h3>\n<p>\u8f93\u5165\uff1anum = 16<br \/>\n\u8f93\u51fa\uff1atrue<\/p>\n<h3>\u793a\u4f8b2<\/h3>\n<p>\u8f93\u5165\uff1anum = 14<br \/>\n\u8f93\u51fa\uff1afalse<\/p>\n<h3>\u5206\u6790<\/h3>\n<p>num\u662f\u6b63\u6574\u6570\uff0c\u6240\u4ee5\u5982\u679cnum\u662f\u4e00\u4e2a\u5b8c\u5168\u5e73\u65b9\u6570\uff0c\u90a3\u4e48\u57281-num\u7684\u533a\u95f4\u5185\u5b58\u5728\u4e00\u4e2a\u6570X\uff0c\u6ee1\u8db3X\u00b2 = num,\u4e14\u533a\u95f4[1,X)\u5185\u7684\u4efb\u4f55\u6570\u7684\u5e73\u65b9\u90fd\u5c0f\u4e8enum\uff0c\u533a\u95f4(x,num]\u5185\u7684\u4efb\u4f55\u6570\u90fd\u5927\u4e8enum\u3002<\/p>\n<h3>\u5b9e\u73b0<\/h3>\n<pre><code class=\"language-java\">class Solution {\n    public boolean isPerfectSquare(int num) {\n        int left = 0;\n        int right = num;\n        while(left &lt; right) {\n            int mid = left + right &gt;&gt;&gt; 1;\n            \/\/\u8f6c\u4e3along\u8fdb\u884c\u6bd4\u8f83\uff0cint\u53ef\u80fd\u4f1a\u6ea2\u51fa\n            long x = (long)mid * mid;\n            if(x &lt; num) {\n                left = mid + 1;\n            }else {\n                right = mid;\n            }\n        }\n        return left * left == num;\n    }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>367.\u6709\u6548\u7684\u5b8c\u5168\u5e73\u65b9\u6570 \u7ed9\u5b9a\u4e00\u4e2a\u6b63\u6574\u6570num \uff0c\u7f16\u5199\u4e00\u4e2a\u51fd\u6570\uff0c\u5982\u679cnum\u662f\u4e00\u4e2a\u5b8c\u5168\u5e73\u65b9\u6570\uff0c\u5219\u8fd4\u56detrue\uff0c\u5426\u5219\u8fd4\u56defalse\u3002  &#8230;<\/p>","protected":false},"author":1,"featured_media":760,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[68,11],"_links":{"self":[{"href":"https:\/\/bigwer.cn\/index.php\/wp-json\/wp\/v2\/posts\/757"}],"collection":[{"href":"https:\/\/bigwer.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bigwer.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bigwer.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bigwer.cn\/index.php\/wp-json\/wp\/v2\/comments?post=757"}],"version-history":[{"count":3,"href":"https:\/\/bigwer.cn\/index.php\/wp-json\/wp\/v2\/posts\/757\/revisions"}],"predecessor-version":[{"id":782,"href":"https:\/\/bigwer.cn\/index.php\/wp-json\/wp\/v2\/posts\/757\/revisions\/782"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bigwer.cn\/index.php\/wp-json\/wp\/v2\/media\/760"}],"wp:attachment":[{"href":"https:\/\/bigwer.cn\/index.php\/wp-json\/wp\/v2\/media?parent=757"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bigwer.cn\/index.php\/wp-json\/wp\/v2\/categories?post=757"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bigwer.cn\/index.php\/wp-json\/wp\/v2\/tags?post=757"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}