1.搜索 //回溯 2.DP(动态规划) 3.贪心 北大ACM题分类2009-01-27 1 4.图论 //Dijkstra.最小生成树.网络流 5.数论 //解模线性方程 6.计算几何 //凸壳.同等安置矩形的并的面积与周长sp; 7.组合数学 //Polya定理 8.模拟 9.数据结构 //并查集.堆sp; 10.博弈论 1. 排序 sp; 1423, 1694, 1723, 1727, 1763, 1788, 1828, 1838, 1840, 2201, 2376, 2377, 2380…

北大ACM - POJ试题分类 -- By EXP 2017-12-03 转载请注明出处: by EXP http://exp-blog.com/2018/06/28/pid-38/ 相关推荐文: 旧版POJ分类目录: http://exp-blog.com/2018/06/10/pid-136/ ACM绝版资源公开( 参考书.模板.讲义.指导): http://exp-blog.com/2018/07/11/pid-1777/ ACM国家集训队论文集(1999-2009): http://ex…

题目链接 http://poj.org/problem?id=1753 题意 一个棋盘上有16个格子,按4×4排列,每个格子有两面,两面的颜色分别为黑色和白色,游戏的每一轮选择一个格子翻动,翻动该格子意味着将该格子及其上下左右格子(如果存在的话)的黑面朝上变成白面朝上,反之亦然,游戏的目标是格子全部黑面朝上或者全部白面朝上.输入棋盘的初始状态,求最少经过多少轮可以达到游戏的目标. 思路 求最少轮数,我会想到使用bfs来解决(dfs也可以解决),但使用bfs求解,如果每个状态都直接存储下当前棋盘的…

Flip Game Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 30449   Accepted: 13232 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…

链接:http://poj.org/problem?id=1753 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 either i…

题意:4*4的正方形,每个格子有黑白两面,翻转格子使得4*4个格子显示全黑或全白,翻转要求:选中的那个格子,以及其上下左右相邻的格子(如果存在)要同时翻转.输出最小的达到要求的翻转次数或者Impossible(如果不可能) 题目链接:http://poj.org/problem?id=1753 分析:因为每个格子只有黑白两面,所以对于每个格子来说,要么不翻转,要么翻转一次,因为翻转奇数次结果和翻转一次得到的效果是一样的,而翻转偶数次得到的效果和不翻转是一样的,则总共有16个格子,最多要翻转16次…

在百度文库上找到的,不知是哪位大牛整理的,真的很不错! zz题 目分类 Posted by fishhead at 2007-01-13 12:44:58.0 -------------------------------------------------------------------------------- acm.pku.edu.cn 1. 排序 1423, 1694, 1723, 1727, 1763, 1788, 1828, 1838, 1840, 2201, 2376, 23…

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 either it's black or white side up. Each r…

题目链接: https://vjudge.net/problem/POJ-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? 思路: 直接二进制枚举16个元素的子集,判断哪些点需要进行翻转操作 #include<iostream> #include<cstdio> #include<cs…

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 either it's black or white side up. Each round you f…