{"id":711,"date":"2020-09-26T11:13:28","date_gmt":"2020-09-26T03:13:28","guid":{"rendered":"http:\/\/39.96.58.60\/?p=711"},"modified":"2022-10-18T16:38:15","modified_gmt":"2022-10-18T08:38:15","slug":"leetcode-347-%e5%89%8d-k-%e4%b8%aa%e9%ab%98%e9%a2%91%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=711","title":{"rendered":"Leetcode 347. \u524d K \u4e2a\u9ad8\u9891\u5143\u7d20"},"content":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u975e\u7a7a\u7684\u6574\u6570\u6570\u7ec4\uff0c\u8fd4\u56de\u5176\u4e2d\u51fa\u73b0\u9891\u7387\u524d&nbsp;<strong><em>k&nbsp;<\/em><\/strong>\u9ad8\u7684\u5143\u7d20\u3002<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u793a\u4f8b 1:<\/strong><\/p>\n<pre><strong>\u8f93\u5165: <\/strong>nums = [1,1,1,2,2,3], k = 2\n\n<strong>\u8f93\u51fa: <\/strong>[1,2]\n\n<\/pre>\n<p><strong>\u793a\u4f8b 2:<\/strong><\/p>\n<pre><strong>\u8f93\u5165: <\/strong>nums = [1], k = 1\n\n<strong>\u8f93\u51fa: <\/strong>[1]<\/pre>\n<p>&nbsp;<\/p>\n<p><strong>\u63d0\u793a\uff1a<\/strong><\/p>\n<ul>\n<li>\u4f60\u53ef\u4ee5\u5047\u8bbe\u7ed9\u5b9a\u7684&nbsp;<em>k&nbsp;<\/em>\u603b\u662f\u5408\u7406\u7684\uff0c\u4e14 1 \u2264 k \u2264 \u6570\u7ec4\u4e2d\u4e0d\u76f8\u540c\u7684\u5143\u7d20\u7684\u4e2a\u6570\u3002<\/li>\n<li>\u4f60\u7684\u7b97\u6cd5\u7684\u65f6\u95f4\u590d\u6742\u5ea6<strong>\u5fc5\u987b<\/strong>\u4f18\u4e8e O(<em>n<\/em> log <em>n<\/em>) ,&nbsp;<em>n&nbsp;<\/em>\u662f\u6570\u7ec4\u7684\u5927\u5c0f\u3002<\/li>\n<li>\u9898\u76ee\u6570\u636e\u4fdd\u8bc1\u7b54\u6848\u552f\u4e00\uff0c\u6362\u53e5\u8bdd\u8bf4\uff0c\u6570\u7ec4\u4e2d\u524d k \u4e2a\u9ad8\u9891\u5143\u7d20\u7684\u96c6\u5408\u662f\u552f\u4e00\u7684\u3002<\/li>\n<li>\u4f60\u53ef\u4ee5\u6309\u4efb\u610f\u987a\u5e8f\u8fd4\u56de\u7b54\u6848\u3002<\/li>\n<\/ul>\n<p>**\u96be\u5ea6**: Medium<\/p>\n<p>**\u6807\u7b7e**: \u5806\u3001 \u54c8\u5e0c\u8868\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\uff1a40 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8698.35% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a16.5 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8683.91% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u5148\u904d\u5386\u6574\u4e2a\u5217\u8868\uff0c\u7edf\u8ba1\u6bcf\u4e2a\u6570\u5b57\u51fa\u73b0\u7684\u6b21\u6570\n    \u7136\u540e\u7ffb\u8f6c\u5b57\u5178\uff0c\u7edf\u8ba1\u51fa\u73b0\u6b21\u6570\uff0c\u5e76\u6392\u5e8f\uff0c\u4ece\u7ffb\u8f6c\u5b57\u5178\u4e2d\u67e5\u627e\u5bf9\u5e94\u7684\u6570\u5b57\n\"\"\"\nclass Solution:\n    def topKFrequent(self, nums: List[int], k: int) -&gt; List[int]:\n        record = {}\n        for num in nums:\n            if num not in record:\n                record[num] = 1\n            else:\n                record[num] += 1\n\n        record_ = {}\n        for key, value in record.items():\n            if value not in record_:\n                record_[value] = [key]\n            else:\n                record_[value].append(key)\n\n        value = list(record.values())\n        value.sort(reverse=True)\n\n        result = []\n        if k == 1:\n            result.extend(record_[value[0]])\n            return result\n\n        for k in set(value[:k]):\n            result.extend(record_[k])\n        return result<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u4e2a\u975e\u7a7a\u7684\u6574\u6570\u6570\u7ec4\uff0c\u8fd4\u56de\u5176\u4e2d\u51fa\u73b0\u9891\u7387\u524d&nbsp;k&nbsp;\u9ad8\u7684\u5143\u7d20\u3002 &nbsp; \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\/711"}],"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=711"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/711\/revisions"}],"predecessor-version":[{"id":712,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/711\/revisions\/712"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=711"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=711"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=711"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}