小坏蛋_千千

3013: 皇后问题(递归)时间限制: 1 Sec  内存限制: 128 MB提交: 2  解决: 2题目描述编写一个函数，求解皇后问题：在n*n的方格棋盘上，放置n个皇后，要求每个皇后不同行、不同列、不同左右对角线。 要求：1、皇后的个数由用户输入，其值不能超过20，输出所有的解。2、采用递归回溯的方法解决。输入

Description You are given an undirected graph consisting of n vertices and n(n−1)2−m" role="presentation">n(n−1)2−mn(n−1)2−m\frac{n(n-1)}{2}-m edges. Instead of giving you the edges

Description Olya loves energy drinks. She loves them so much that her room is full of empty cans from energy drinks. Formally, her room can be represented as a field of n × m cells, each cell of

Description 给定一个自然数 N ，找出一个 M ，使得 M > 0 且 M 是 N 的倍数，并且 M 的 10 进制表示只包含 0 或 1 ，求最小的 M 。 例如：N = 4，M = 100。 Input 输入 1 个数 N 。(1 <= N <= 10^6) Output 输出符合条件的最小的 M 。 Sample Input4 Sample Outpu

Description Ilya is very fond of graphs, especially trees. During his last trip to the forest Ilya found a very interesting tree rooted at vertex 1. There is an integer number written on each vertex

Description WNJXYK and DIDIDI is playing a game. DIDIDI draws a directed graph G on the paper which contains n points, m directed edges and no cycle. WNJXYK starts from point 1. For every round, WNJX

描述 给你一张某一海域卫星照片，你需要统计： 照片中海岛的数目 照片中面积不同的海岛数目 照片中形状不同的海岛数目 其中海域的照片如下，”.”表示海洋，”#”表示陆地。在”上下左右”四个方向上连在一起的一片陆地组成一座岛屿。 .####.......#.####.#......#...##.#. 上图所示的照片中一共有4座岛屿；其中3座面

Description There are colorful flowers in the parterre in front of the door of college and form many beautiful patterns. Now, you want to find a circle consist of flowers with same color. What should

Description A university network is composed of N computers. System administrators gathered information on the traffic between nodes, and carefully divided the network into two subnetworks in order t

Description You are given two pots, having the volume of A and B liters respectively. The following operations can be performed: FILL(i) fill the pot i (1 ≤ i ≤ 2) from the tap; DROP

Description Given a positive integer n, write a program to find out a nonzero multiple m of n whose decimal representation contains only the digits 0 and 1. You may assume that n is not greater than

Description You are trapped in a 3D dungeon and need to find the quickest way out! The dungeon is composed of unit cubes which may or may not be filled with rock. It takes one minute to move one unit

Description Background The knight is getting bored of seeing the same black and white squares again and again and has decided to make a journey around the world. Whenever a knight moves,

Description Farmer John has been informed of the location of a fugitive cow and wants to catch her immediately. He starts at a point N (0 ≤ N ≤ 100,000) on a number line and the cow is at a point K (

Description The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four-digit room numbers on their offices. — It

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 written decimal digits from 1 t

4 Values whose Sum is 0Time Limit: 15000MS Memory Limit: 228000KTotal Submissions: 20020 Accepted: 5977Case Time Limit: 5000MSDescriptionThe SUM problem

Red and BlackTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 17510    Accepted Submission(s): 10642Problem DescriptionThere is a

Description Each New Year Timofey and his friends cut down a tree of n vertices and bring it home. After that they paint all the n its vertices, so that the i-th vertex gets color ci. Now it’