知道是数独问题后犹豫了一下要不要做(好像很难的样纸==.),用dfs并剪枝,是一道挺规范的搜索题. 先介绍以下数独吧- 数独(Sudoku)是一种运用纸.笔进行演算的逻辑游戏.玩家需要根据9×9盘面上的已知数字,推理出所有剩余空格 的数字,并满足每一行.每一列.每一个粗线宫内的数字均含1-9,不重复. 每一道合格的数独谜题都有且仅有唯一答案,推理方法也以此为基础,任何无解或多解的题目都是不合格的. 有一种求解数独问题的方案是“候选数字法”,就是在待填充的格子中填写不会造成行重复.列重复.块重复的…

SudoKu Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%lld & %llu POJ 2676 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. In some of the c…

dfs 用的还是不行啊,做题还是得看别人的博客!!! 题目:http://poj.org/problem?id=2676 题意:把一个9行9列的网格,再细分为9个3*3的子网格,要求每行.每列.每个子网格内都只能使用一次1~9中的一个数字,即每行.每列.每个子网格内都不允许出现相同的数字. 0是待填位置,其他均为已填入的数字. 要求填完九宫格并输出(如果有多种结果,则只需输出其中一种) 如果给定的九宫格无法按要求填出来,则输出原来所输入的未填的九宫格 参考博客:http://www.cnblog…

POJ 2676 Sudoku Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 17627   Accepted: 8538   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…

  Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 14368   Accepted: 7102   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. In so…

题目链接:http://poj.org/problem?id=2676 Time Limit: 2000MS Memory Limit: 65536K 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. In some of the cells are writte…

Sudoku Problem's Link:   http://poj.org/problem?id=2676 Mean: 略 analyse: 记录所有空位置,判断当前空位置是否可以填某个数,然后直接DFS,注意从后往前搜索,时间比正向搜快很多.16ms水过 Time complexity: O(n) Source code:  // Memory Time // 1347K 0MS // by : crazyacking // 2015-04-10-14.30 #include<map>…

Sudoku 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. In some of the cells are written decimal digits from 1 to 9. The other cells are empty. The goal is to fill the…

Sudoku Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 12005   Accepted: 5984   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.…

Sudoku Time Limit : 4000/2000ms (Java/Other)   Memory Limit : 131072/65536K (Java/Other) Total Submission(s) : 15   Accepted Submission(s) : 12 Special Judge Problem Description Sudoku is a very simple task. A square table with 9 rows and 9 columns i…