POJ3009 DFS+剪枝 原题: Curling 2.0 Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 16280 Accepted: 6725 Description On Planet MM-21, after their Olympic games this year, curling is getting popular. But the rules are somewhat different from our…

Description A Sudoku grid is a 16x16 grid of cells grouped in sixteen 4x4 squares, where some cells are filled with letters from A to P (the first 16 capital letters of the English alphabet), as shown in figure 1a. The game is to fill all the empty g…

任意门:http://acm.hdu.edu.cn/showproblem.php?pid=6341 Problem J. Let Sudoku Rotate Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 1363    Accepted Submission(s): 717 Problem Description Sudoku i…

Sudoku Time Limit: 10000MS   Memory Limit: 65536K Total Submissions: 5769   Accepted: 2684 Description A Sudoku grid is a 16x16 grid of cells grouped in sixteen 4x4 squares, where some cells are filled with letters from A to P (the first 16 capital l…

题目:有一个4*4*4*4的数独,每一横每一竖每一个小方块中都无重复的字母,即都为0-9,A-F..有一个已经填好的数独,若干个4*4的方块被逆时针拧转了若干次,问拧转回来至少需要多少次. 分析:很明显的一道深授暴力题 , 一开始不知道是怎么收才好 , 那时候考虑说假如同一行或者同一列都有区域要反转 , 我该怎么找 , 后来看了题解后发现 , 我只要保证每次旋转后 , 该区域与此前的区域是满足数独的就好 , 子问题的不重复不会影响到大问题的不重复 .深搜索的能力需要加强 #include<bit…

题目传送门 /* 题意:若干小木棍,是由多条相同长度的长木棍分割而成,问最小的原来长木棍的长度: DFS剪枝:剪枝搜索的好题!TLE好几次,终于剪枝完全! 剪枝主要在4和5:4 相同长度的木棍不再搜索:5 若新的搜索连第一条都没组合出来,直接break: 详细解释:http://blog.csdn.net/lyy289065406/article/details/6647960 http://www.cnblogs.com/devil-91/archive/2012/08/03/2621787.…

Sticks Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 127771   Accepted: 29926 Description George took sticks of the same length and cut them randomly until all parts became at most 50 units long. Now he wants to return sticks to the or…

Sum It Up Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 65536/32768K (Java/Other) Total Submission(s) : 4   Accepted Submission(s) : 1 Font: Times New Roman | Verdana | Georgia Font Size: ← → Problem Description Given a specified total t and…

Description A Sudoku grid is a 16x16 grid of cells grouped in sixteen 4x4 squares, where some cells are filled with letters from A to P (the first 16 capital letters of the English alphabet), as shown in figure 1a. The game is to fill all the empty g…

3076 思路: dfs + 剪枝 首先,如果这个位置只能填一种字母,那就直接填 其次,如果对于每一种字母,如果某一列或者某一行或者某一块只能填它,那就填它 然后,对于某个位置如果不能填字母了,或者某种字母在一行一列或一块中出向了两次以上,说明当前方案不成立 最后贪心地从可选情况少的往下搜 代码: #pragma GCC optimize(2) #pragma GCC optimize(3) #pragma GCC optimize(4) #include<iostream> #include…