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Office Keystime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputThere are n people and k keys on a straight line. Every person wants to get to the offi... 阅读全文
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因为下午要打多校,时间上来不及了,所以上午没开CF。继续看题。还是看网络流,一道题目大部分时间耗费在了读题面上,很是着急。。。目前看qsczse博客的进度是将网络流(包括二分图)推进了大概2/3,今天早上记了一下:一道中等的英文题读题需要15分钟,还不一定能看懂,需要凑样例;读出题目之后10分钟之后就大概能判断出需不需要看题解了。英文题太浪费时间了,不看英文题了,只看他BZOJ的中文题,而且BZO... 阅读全文
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求,盒子都可以分成是否不能区分,和能区分,还能分成是否能有空箱子,所以一共是8种情况,我们现在来一一讨论。1.球同,盒不同,无空箱C(n-1,m-1), n>=m0, n=0dp[k][0]=0,k>=10,n=mdp[n][m]=dp[n][m-1], n=m0, n<m因为要求无空箱,我们先在每个箱子里面放1个球,然后还剩下n-m个球了,再根据情况7答案就出来了如果有错误,希望菊苣指出~转载请... 阅读全文
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Hybrid CrystalsTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 300 Accepted Submission(s): 179Problem Description> Kyber crystals, also calle... 阅读全文
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B. The Bakerytime limit per test2.5 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputSome time ago Slastyona the Sweetmaid decided to open her own bakery! She bought re... 阅读全文
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想到写这个是因为今年多校联合训练3的1004题题目中有一个子问题是求一个串内不同数的种类数数 最小的区间。官方题解(http://bestcoder.hdu.edu.cn/blog/2017-multi-university-training-contest-4-solutions-by-%e9%99%88%e6%9d%be%e6%9d%a8/)是利用线段树来处理的:首先,预处理一下字符串,求出每... 阅读全文
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Time Limit: 3000MSMemory Limit: 65536KTotal Submissions: 3119Accepted: 696DescriptionThe Disc, being flat, has no real horizon. Any adventurous sailors who get funny ideas from staring at eggs and ora... 阅读全文
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Time Limit: 1000MSMemory Limit: 30000KTotal Submissions: 8141Accepted: 3674DescriptionEvery year, Farmer John's N (1 9 #include 10 #include 11 #include 12 #include 13 using namespace std; 14 typ... 阅读全文
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Is Derek lying?Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 612 Accepted Submission(s): 353Problem DescriptionDerek and Alfia are good fri... 阅读全文