Flip Game Time Limit: 1000MS  Memory Limit: 65536K  Total Submissions: 4863  Accepted: 1983 Description Flip game is played on a rectangular 4x4 field with two-sided pieces placed on each of its 16 squares. One side of each piece is white and the oth…

题目网址:http://poj.org/problem?id=1753 题目: Flip Game Description Flip game is played on a rectangular 4x4 field with two-sided pieces placed on each of its 16 squares. One side of each piece is white and the other one is black and each piece is lying ei…

题目地址:http://poj.org/problem?id=1753 /* 这题几乎和POJ 2965一样,DFS函数都不用修改 只要修改一下change规则... 注意:是否初始已经ok了要先判断 */ #include <cstdio> #include <iostream> #include <algorithm> #include <cstring> #include <cmath> #include <string> #i…

Description Flip game squares. One side of each piece is white and the other one is black and each piece is lying either it's black or white side up. Each round you flip 3 to 5 pieces, thus changing the color of their upper side from black to white a…

Flip game is played on a rectangular 4x4 field with two-sided pieces placed on each of its 16 squares. One side of each piece is white and the other one is black and each piece is lying either it's black or white side up. Each round you flip 3 to 5 p…

Flip Game Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 37427   Accepted: 16288 Description Flip game is played on a rectangular 4x4 field with two-sided pieces placed on each of its 16 squares. One side of each piece is white and the…

题目链接:http://poj.org/problem?id=1753 题意: 给你一个4*4的棋盘,上面有两种颜色的棋子(一种黑色,一种白色),你一次可以选择一个棋子翻转它(黑色变成白色,同理反之),选择的这枚棋子的上下左右都会被翻动(前提是上下左右都可以被翻动).问最少可以翻动多少颗棋子,让整个棋盘变成全部黑色或者全部白色. 题解: 4*4一共就16个格子,每个格子都可以是翻或者不翻,那么就是216翻法. 所以就可以用状态压缩的方法来解决. 比如说47. 47的二进制是00101111,我们…

https://vjudge.net/problem/POJ-1753 题意 4*4的棋盘,翻转其中的一个棋子,会带动邻接的棋子一起动.现要求把所有棋子都翻成同一种颜色,问最少需要几步. 分析 同一个棋子翻偶数次等于没有翻,翻奇数次就浪费步数,因此每个棋子最多翻一次,也就是说,答案最大就是16.故总状态数就是2^16,可以直接dfs暴力.还有另一种思路就是状态压缩,把棋盘压成16位的数字,翻转时采用异或操作,我们暴力枚举每个状态,即所有选择棋子的可能情况跑一遍,对于每一个棋子,对其能影响的位置可…

Flip Game Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 45691   Accepted: 19590 Description Flip game is played on a rectangular 4x4 field with two-sided pieces placed on each of its 16 squares. One side of each piece is white and the…

Corn Fields Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 9806   Accepted: 5185 Description Farmer John has purchased a lush new rectangular pasture composed of M by N (1 ≤ M ≤ 12; 1 ≤ N ≤ 12) square parcels. He wants to grow some yumm…