http://poj.org/problem?id=1753 题意:一个4*4的棋盘,只有黑和白两种棋子,每次翻转一个棋子,并且其四周的棋子也跟着翻转,求棋盘全为黑或全为白时所需的最少翻转次数. 思路:暴力枚举. 一共16个棋子,所以可以用二进制来存储.后来看了一下别人的代码,发现居然可以用异或运算来计算翻转情况,方便了不少. #include<iostream> #include<cstdio> #include<cstring> #include<queue&…

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…

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: 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…

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:http://poj.org/problem?id=1753 因为粗心错了好多次……,尤其是把1<<15当成了65535: 参考博客:http://www.cnblogs.com/kuangbin/archive/2011/07/30/2121677.html 主要思想: 1.如果用一个4*4的数组存储每一种状态,不但存储空间很大,而且在穷举状态时也不方便记录.因为每一颗棋子都只有两种状态,所以可以用二进制0和1表示每一个棋子的状态,则棋盘的状态就可以用一个16位的整数唯一标识.而翻转的…

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…

题目地址链接:http://poj.org/problem?id=1753 题目大意: 有4*4的正方形,每个格子要么是黑色,要么是白色,当把一个格子的颜色改变(黑->白或者白->黑)时,其周围上下左右(如果存在的话)的格子的颜色也被反转,问至少反转几个格子可以使4*4的正方形变为纯白或者纯黑? 解题思路: 因为只有16个格子,且只有黑白两种状态,想到用一个二进制整数来表示棋盘的状态.首先你需要明白这个题目的两个性质——任何一个格子翻偶数次等同于不翻:翻格子的顺序对最终的结果是没有影响的,也就…

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…

1.链接地址: http://bailian.openjudge.cn/practice/1753/ http://poj.org/problem?id=1753 2.题目: 总时间限制: 1000ms 内存限制: 65536kB 描述 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 wh…