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…

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…

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…

DLX精确覆盖模具称号..... Sudoku Time Limit: 10000MS   Memory Limit: 65536K Total Submissions: 4416   Accepted: 2143 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 f…

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…

[题目链接] http://poj.org/problem?id=3076 [算法] 将数独问题转化为精确覆盖问题,用Dancing Links求解 [代码] #include <algorithm> #include <bitset> #include <cctype> #include <cerrno> #include <clocale> #include <cmath> #include <complex> #in…

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…

题目大意: 16*16的数独. 思路分析: 多说无益. 想说的就是dancing links 的行是依照 第一行第一列填 1 第一行第二列填 2 -- 第一行第十五列填15 第一行第二列填 1 -- 第二行.... 列的纺织则是 第一行放1,第一行放2,..第十六行放16...第一列放1..第一列放2...第十六列放16..第一块区域放1 ....然后在最后81位就是放自己的位置,准确的说就是 r*m+c. #include <cstdio> #include <iostream>…

Sudoku Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 25356   Accepted: 11849   Special Judge Description Sudoku is a very simple task. A square table with 9 rows and 9 columns is divided to 9 smaller squares 3x3 as shown on the Figure.…

和3074仅仅有数目的不同,3074是9×9.本来想直接用3074的.然后MLE,,,就差那么20M的空间,,. 从这里学习到了解法: http://www.cnblogs.com/ylfdrib/archive/2010/10/06/1844785.html…