C. Sorting Railway Cars time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are d…

C. Sorting Railway Cars   An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are distinct) and positioned in arbitrary order. David Blaine wants to sort the railway cars in the order of incr…

Description An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are distinct) and positioned in arbitrary order. David Blaine wants to sort the railway cars in the order of increasing numbers…

题目描述 An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are distinct) and positioned in arbitrary order. David Blaine wants to sort the railway cars in the order of increasing numbers. In on…

http://codeforces.com/gym/101142/attachments 题意:每个人在TC和CF上分别有两个排名,如果有一个人在任意一个网站上大于另一个人的排名,那么这个人可以打败另外一个人.还有就是如果 B 能打败 A, C 能打败 B,但是 C 直接从排名上看 C 并不能打败 A,但是因为 B -> A 并且 C -> B,所以 C -> B -> A, 即 C 也能(通过打败 B 来)打败 A. 如这个样例: A :5, 5 , B :1, 6,  C:2,…

http://codeforces.com/contest/876/problem/D 题意:题意真是难懂,就是给一串序列,第i次操作会在p[x](1<=x<=i)这些位置放上硬币,然后从左到右观察,如果第i个位置有硬币但第i+1个位置没有硬币,那么互换,然后继续从第i+1个硬币开始看.直到不需要交换,需要计算出到终极状态需要多少步. 思路: 模拟. #include<iostream> #include<algorithm> #include<cstring&g…

题目链接:E. Maximum Subsequence 用了一个Meet-in-the-middle的技巧,还是第一次用到这个技巧,其实这个技巧和二分很像,主要是在dfs中,如果数量减小一半可以节约很多的时间.  Meet in the middle(有时候也叫作split and merge)是一种用以获取足够高效解决方案的灵巧的思想.和分治思想非常类似,它将问题分割成两个部分,然后试着合并这两个子问题的结果.好处在于通过使用一点额外的空间,你可以解决两倍规模的原来可以解决的问题. #in…

C. Sorting Railway Cars Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://www.codeforces.com/contest/606/problem/C Description An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are distin…

C. Sorting Railway Cars time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are d…

Sorting Railway Cars time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An infinitely long railway has a train consisting of n cars, numbered from 1 to n (the numbers of all the cars are dist…