{"id":191,"date":"2019-08-08T17:55:00","date_gmt":"2019-08-08T17:55:00","guid":{"rendered":"https:\/\/imwarming.com\/?p=191"},"modified":"2019-08-08T17:55:00","modified_gmt":"2019-08-08T17:55:00","slug":"codeforcesround%23577%28div-2%29c-maximummedian","status":"publish","type":"post","link":"https:\/\/imwarming.com\/?p=191","title":{"rendered":"Codeforces Round #577 (Div. 2) C. Maximum Median"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img2018.cnblogs.com\/blog\/1634852\/201908\/1634852-20190809014117102-188320315.png\" alt=\"\" \/><\/p>\n<p>\u9898\u610f\uff1a\u5c31\u662f\u7ed9\u4e00n(\u5947\u6570)\u4e2a\u5143\u7d20\u6570\u7ec4\uff0c\u53ef\u4ee5\u5bf9\u5b83\u7684\u5143\u7d20\u6267\u884ck\u6b21+1\u64cd\u4f5c\uff0c\u9012\u589e\u6392\u5e8f\uff0c\u6c42\u4e2d\u4f4d\u6570\u6700\u5927\u662f\u591a\u5c11\u3002<\/p>\n<p>\u90a3\u6211\u4eec\u5728\u6392\u5b8c\u5e8f\u4e4b\u540e\uff0c\u4e2d\u4f4d\u6570\u524d\u7684\u5143\u7d20\u53ef\u4ee5\u4e0d\u7ba1\u5b83\uff0c\u53ea\u8981\u5bf9\u4e2d\u4f4d\u6570\u540e\u7684\u64cd\u4f5c\u5c31\u884c\uff0c\u6211\u4eec\u8981\u5224\u65ad\u548c\u4e2d\u4f4d\u6570\u76f8\u7b49\u7684\u5143\u7d20\u6709\u51e0\u4e2a\uff0c\u518d\u7528k\u51cf\u53bb\u5b83\uff0c\u5faa\u73af\u4e00\u4e0b\uff0c\u5f53k\u5c0f\u4e8e0\u65f6\u6ca1\u7684\u51cf\u4e86\uff0c\u4e5f\u5c31\u662f\u6570\u7ec4\u5143\u7d20\u4e0d\u80fd\u518d\u52a0\u4e86\u65f6\u8df3\u51fa\u6765\u3002<\/p>\n<p>\u9644ac\u4ee3\u7801\uff1a<\/p>\n<div class=\"cnblogs_code\">\n<pre><span style=\"color: #008080;\"> 1<\/span> #include&lt;cstdio&gt;\n<span style=\"color: #008080;\"> 2<\/span> #include&lt;iostream&gt;\n<span style=\"color: #008080;\"> 3<\/span> #include&lt;cstring&gt;\n<span style=\"color: #008080;\"> 4<\/span> #include&lt;cmath&gt;\n<span style=\"color: #008080;\"> 5<\/span> #include&lt;algorithm&gt;\n<span style=\"color: #008080;\"> 6<\/span> <span style=\"color: #0000ff;\">#define<\/span> ma (int)2e5+1\n<span style=\"color: #008080;\"> 7<\/span> <span style=\"color: #0000ff;\">using<\/span> <span style=\"color: #0000ff;\">namespace<\/span><span style=\"color: #000000;\"> std;\n<\/span><span style=\"color: #008080;\"> 8<\/span> <span style=\"color: #0000ff;\">int<\/span><span style=\"color: #000000;\"> main(){\n<\/span><span style=\"color: #008080;\"> 9<\/span>     <span style=\"color: #0000ff;\">int<\/span><span style=\"color: #000000;\"> n,k,a[ma];\n<\/span><span style=\"color: #008080;\">10<\/span>     cin&gt;&gt;n&gt;&gt;<span style=\"color: #000000;\">k;\n<\/span><span style=\"color: #008080;\">11<\/span>     <span style=\"color: #0000ff;\">for<\/span>(<span style=\"color: #0000ff;\">int<\/span> i=<span style=\"color: #800080;\">1<\/span>;i&lt;=n;i++<span style=\"color: #000000;\">){\n<\/span><span style=\"color: #008080;\">12<\/span>         cin&gt;&gt;<span style=\"color: #000000;\">a[i];\n<\/span><span style=\"color: #008080;\">13<\/span> <span style=\"color: #000000;\">    }\n<\/span><span style=\"color: #008080;\">14<\/span>     <span style=\"color: #0000ff;\">if<\/span>(n==<span style=\"color: #800080;\">1<\/span><span style=\"color: #000000;\">){\n<\/span><span style=\"color: #008080;\">15<\/span>         cout&lt;&lt;a[<span style=\"color: #800080;\">1<\/span>]+<span style=\"color: #000000;\">k;\n<\/span><span style=\"color: #008080;\">16<\/span>         <span style=\"color: #0000ff;\">return<\/span> <span style=\"color: #800080;\">0<\/span><span style=\"color: #000000;\">;\n<\/span><span style=\"color: #008080;\">17<\/span> <span style=\"color: #000000;\">    }\n<\/span><span style=\"color: #008080;\">18<\/span>     sort(a+<span style=\"color: #800080;\">1<\/span>,a+<span style=\"color: #800080;\">1<\/span>+<span style=\"color: #000000;\">n);\n<\/span><span style=\"color: #008080;\">19<\/span>     <span style=\"color: #0000ff;\">int<\/span> i,l=<span style=\"color: #800080;\">0<\/span>,q=(n+<span style=\"color: #800080;\">1<\/span>)\/<span style=\"color: #800080;\">2<\/span><span style=\"color: #000000;\">;\n<\/span><span style=\"color: #008080;\">20<\/span>     <span style=\"color: #0000ff;\">for<\/span>(i=a[q];k&gt;=<span style=\"color: #800080;\">0<\/span>;i++<span style=\"color: #000000;\">){\n<\/span><span style=\"color: #008080;\">21<\/span>         <span style=\"color: #0000ff;\">while<\/span>(i==a[q+<span style=\"color: #800080;\">1<\/span>])q++<span style=\"color: #000000;\">;\n<\/span><span style=\"color: #008080;\">22<\/span>         k-=q-(<span style=\"color: #800080;\">1<\/span>+n)\/<span style=\"color: #800080;\">2<\/span>+<span style=\"color: #800080;\">1<\/span><span style=\"color: #000000;\">;\n<\/span><span style=\"color: #008080;\">23<\/span> <span style=\"color: #000000;\">    }\n<\/span><span style=\"color: #008080;\">24<\/span>     cout&lt;&lt;i-<span style=\"color: #800080;\">1<\/span><span style=\"color: #000000;\">;\n<\/span><span style=\"color: #008080;\">25<\/span>     <span style=\"color: #0000ff;\">return<\/span> <span style=\"color: #800080;\">0<\/span><span style=\"color: #000000;\">;\n<\/span><span style=\"color: #008080;\">26<\/span> }<\/pre>\n<\/div>\n<p>\u56e0\u4e3a\u6211\u8fd9k=0\u65f6\u8fd8\u4f1a\u64cd\u4f5c\uff0c\u4f46\u662f\u5176\u5b9e\u4e0d\u80fd\u64cd\u4f5c\u4e86\uff0c\u6240\u4ee5i++\u540e\u6211\u8f93\u51fa\u53c8\u8981\u51cf\u56de\u53bb\uff1b\u5982\u679c\u5faa\u73af\u5185\u64cd\u4f5c\u5b8ck&lt;0\uff0c\u90a3\u8bf4\u660e\u4e4b\u524d\u6267\u884ci++\u7684\u64cd\u4f5c\u65e0\u6548\uff0c\u6240\u4ee5\u4e5f\u662fi\u51cf\u56de\u53bb\uff0c\u6700\u540e\u90fd\u8f93\u51fai-1.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img2018.cnblogs.com\/blog\/1634852\/201908\/1634852-20190809015506602-1171299938.jpg\" alt=\"\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9898\u610f\uff1a\u5c31\u662f\u7ed9\u4e00n(\u5947\u6570)\u4e2a\u5143\u7d20\u6570\u7ec4\uff0c\u53ef\u4ee5\u5bf9\u5b83\u7684\u5143\u7d20\u6267\u884ck\u6b21+1\u64cd\u4f5c\uff0c\u9012\u589e\u6392\u5e8f\uff0c\u6c42\u4e2d\u4f4d\u6570\u6700\u5927\u662f\u591a\u5c11\u3002  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-191","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Codeforces Round #577 (Div. 2) C. 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