Flip Game Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 59468   Accepted: 24750 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…

Flip Game   Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 52279   Accepted: 22018 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 th…

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…

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…

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…

题目链接:http://poj.org/problem?id=2488 思路:按照一定的字典序深搜,当时我的想法是把所有的可行的路径都找出来,然后字典序排序. 后来,凡哥说可以在搜索路径的时候就按照字典序搜索,这样一找到可行的路径就输出来就行了.这里我吸取了之前八皇后问题时犯的错,并且优化了一下写法,就是flag,这是参考了jhf大神的写法了. 但是jhf大神的写法,思路和我一样,但是他的x,y坐标还要转来转去,我就没有这么写了,还是按照我的代码风格好一些. #include <stdio.h>…

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…

这个题我看了,都是推荐的神马双向广搜,难道这个深搜你们都木有发现?还是特意留个机会给我装逼? Open the Lock Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 3014    Accepted Submission(s): 1323 Problem Description Now an emergent task for you…

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…

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…