B. Ohana Cleans Up Ohana Matsumae is trying to clean a room, which is divided up into an n by n grid of squares. Each square is initially either clean or dirty. Ohana can sweep her broom over columns of the grid. Her broom is very strange: if she swe…

B. Ohana Cleans Up Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/554/problem/B Description Ohana Matsumae is trying to clean a room, which is divided up into an n by n grid of squares. Each square is initially either clea…

B. Ohana Cleans Up   Ohana Matsumae is trying to clean a room, which is divided up into an n by n grid of squares. Each square is initially either clean or dirty. Ohana can sweep her broom over columns of the grid. Her broom is very strange: if she s…

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…

B. Ohana Cleans Up Time Limit: 2000ms Memory Limit: 262144KB 64-bit integer IO format: %I64d      Java class name: (Any) Submit Status Ohana Matsumae is trying to clean a room, which is divided up into an n by n grid of squares. Each square is initia…

Ohana Cleans Up Description Ohana Matsumae is trying to clean a room, which is divided up into an n by n grid of squares. Each square is initially either clean or dirty. Ohana can sweep her broom over columns of the grid. Her broom is very strange: i…

time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output Ohana Matsumae is trying to clean a room, which is divided up into an n by n grid of squares. Each square is initially either clean or dirty. Oh…

B. Ohana Cleans Up time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Ohana Matsumae is trying to clean a room, which is divided up into an n by n grid of squares. Each square is initially ei…

A. Kyoya and Photobooks Kyoya Ootori is selling photobooks of the Ouran High School Host Club. He has 26 photos, labeled "a" to "z", and he has compiled them into a photo booklet with some photos in some order (possibly with some photo…

  CodeForces 554B Time Limit:2000MS     Memory Limit:262144KB     64bit IO Format:%I64d & %I64u   Description Ohana Matsumae is trying to clean a room, which is divided up into an n by n grid of squares. Each square is initially either clean or dirty…