{"id":477,"date":"2020-09-26T10:46:16","date_gmt":"2020-09-26T02:46:16","guid":{"rendered":"http:\/\/39.96.58.60\/?p=477"},"modified":"2022-10-18T16:39:14","modified_gmt":"2022-10-18T08:39:14","slug":"leetcode-215-%e6%95%b0%e7%bb%84%e4%b8%ad%e7%9a%84%e7%ac%ack%e4%b8%aa%e6%9c%80%e5%a4%a7%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=477","title":{"rendered":"Leetcode 215. \u6570\u7ec4\u4e2d\u7684\u7b2cK\u4e2a\u6700\u5927\u5143\u7d20"},"content":{"rendered":"<p>\u5728\u672a\u6392\u5e8f\u7684\u6570\u7ec4\u4e2d\u627e\u5230\u7b2c <strong>k<\/strong> \u4e2a\u6700\u5927\u7684\u5143\u7d20\u3002\u8bf7\u6ce8\u610f\uff0c\u4f60\u9700\u8981\u627e\u7684\u662f\u6570\u7ec4\u6392\u5e8f\u540e\u7684\u7b2c k \u4e2a\u6700\u5927\u7684\u5143\u7d20\uff0c\u800c\u4e0d\u662f\u7b2c k \u4e2a\u4e0d\u540c\u7684\u5143\u7d20\u3002<\/p>\n<p><strong>\u793a\u4f8b 1:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> <code>[3,2,1,5,6,4] \u548c<\/code> k = 2\n\n<strong>\u8f93\u51fa:<\/strong> 5\n\n<\/pre>\n<p><strong>\u793a\u4f8b&nbsp;2:<\/strong><\/p>\n<pre><strong>\u8f93\u5165:<\/strong> <code>[3,2,3,1,2,4,5,5,6] \u548c<\/code> k = 4\n\n<strong>\u8f93\u51fa:<\/strong> 4<\/pre>\n<p><strong>\u8bf4\u660e: <\/strong><\/p>\n<p>\u4f60\u53ef\u4ee5\u5047\u8bbe k \u603b\u662f\u6709\u6548\u7684\uff0c\u4e14 1 \u2264 k \u2264 \u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/p>\n<p>**\u96be\u5ea6**: Medium<\/p>\n<p>**\u6807\u7b7e**: \u5806\u3001 \u5206\u6cbb\u7b97\u6cd5\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\uff1a1732 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8612.27% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a14 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8660.77% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u5192\u6ce1\u6392\u5e8f\n    \u901a\u8fc7\u5224\u65adk\u4e0enums\u7684\u957f\u5ea6\uff0c\u51b3\u5b9a\u6392\u5e8f\u65b9\u5411\n\"\"\"\nclass Solution:\n    def findKthLargest(self, nums: List[int], k: int) -&gt; int:\n        n = len(nums)\n        if n &lt; 2:\n            return nums[k-1]\n        if k &gt; n\/2: # \u5982\u679c k&gt;nums\u957f\u5ea6\u7684\u4e00\u534a\n            for j in range(n-1):\n                for i in range(n-1-j):\n                    if nums[i] &lt; nums[i + 1]:   # \u4ece\u5927\u5230\u5c0f\u62cd,\u6bcf\u6b21\u5c06\u6700\u5c0f\u503c\u653e\u5230\u672b\u5c3e\n                        nums[i], nums[i + 1] = nums[i + 1], nums[i]\n                if j &gt; n-k-1:\n                    return nums[k-1]    # \u53d6\u7b2ck-1\u4e2a\u5219\u4e3a\u7b2ck\u4e2a\u6700\u5927\u503c\n        else:       # \u5982\u679c\u5927\u4e8e\u957f\u5ea6\u4e00\u534a\n            for j in range(n-1):\n                for i in range(n-1-j):\n                    if nums[i] &gt; nums[i + 1]:   # \u4ece\u5c0f\u5230\u5927\u6392,\u6bcf\u6b21\u5c06\u6700\u5927\u503c\u653e\u5230\u672b\u5c3e\n                        nums[i], nums[i + 1] = nums[i + 1], nums[i]\n                if j &gt; k-2:\n                    return nums[-k] # \u53d6\u7b2c-k\u4e2a\u5373\u4e3a\u7b2ck\u4e2a\u6700\u5927\u6570<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u672a\u6392\u5e8f\u7684\u6570\u7ec4\u4e2d\u627e\u5230\u7b2c k \u4e2a\u6700\u5927\u7684\u5143\u7d20\u3002\u8bf7\u6ce8\u610f\uff0c\u4f60\u9700\u8981\u627e\u7684\u662f\u6570\u7ec4\u6392\u5e8f\u540e\u7684\u7b2c k \u4e2a\u6700\u5927\u7684\u5143\u7d20\uff0c\u800c\u4e0d\u662f\u7b2c k &#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\/477"}],"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=477"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/477\/revisions"}],"predecessor-version":[{"id":478,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/477\/revisions\/478"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=477"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}