B. Kyoya and Permutation Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/553/problem/B Description Let's define the permutation of length n as an array p = [p1, p2, ..., pn] consisting of n distinct integers from range from…

Kyoya and Permutation 这题想了好久才写出来,没看题解写出来的感觉真的好爽啊!!! 题目大意:题意我看了好久才懂,就是给你一个序列,比如[4, 1, 6, 2, 5, 3],第一个数字 的值是4,那么我们找下标为4的数( 跟链表差不多意思 ),然后一直找到底,这些数分为一类, 如[4, 1, 6, 2, 5, 3] 就可以分为三类,[4, 2, 1] , [6, 3],[5],这三类,然后每个类里面按从大 往小排,然后类之间按字典序排,[4, 1, 6, 2, 5, 3] 重…

题目传送门 /* 找规律,水 */ #include <cstdio> #include <iostream> #include <algorithm> #include <cstring> #include <cmath> using namespace std; ; const int INF = 0x3f3f3f3f; ]; int main(void) //Codeforces Round #309 (Div. 2) A. Kyoya a…

C. Kyoya and Colored Balls Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/554/problem/C Description Kyoya Ootori has a bag with n colored balls that are colored with k different colors. The colors are labeled from 1 to k.…

A. Kyoya and Photobooks Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/554/problem/A Description Kyoya Ootori is selling photobooks of the Ouran High School Host Club. He has 26 photos, labeled "a" to "z", a…

Kyoya Ootori has a bag with n colored balls that are colored with k different colors. The colors are labeled from 1 to k. Balls of the same color are indistinguishable. He draws balls from the bag one by one until the bag is empty. He noticed that he…

A. Kyoya and Photobooks time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Kyoya Ootori is selling photobooks of the Ouran High School Host Club. He has 26 photos, labeled "a" to "z…

题目传送门 /* 题意:某几列的数字翻转,使得某些行全为1,求出最多能有几行 想了好久都没有思路,看了代码才知道不用蠢办法,匹配初始相同的行最多能有几对就好了,不必翻转 */ #include <cstdio> #include <algorithm> #include <string> #include <cmath> #include <iostream> using namespace std; ; const int INF = 0x3f…

A. Kyoya and Colored Balls 大意: 给定$k$种颜色的球, 第$i$种颜色有$c_i$个, 一个合法的排列方案满足最后一个第$i$种球的下一个球为第$i+1$种球, 求合法方案数. 简单组合, 添加第$i$种时必须在最后放一个$i$, 剩余任意放, 可重组合算下贡献即可. #include <iostream> #include <cstdio> #define REP(i,a,n) for(int i=a;i<=n;++i) #define PER…

C. Kyoya and Colored Balls Kyoya Ootori has a bag with n colored balls that are colored with k different colors. The colors are labeled from 1 to k. Balls of the same color are indistinguishable. He draws balls from the bag one by one until the bag i…