小寒

输入一个n*n的黑白图像（1表示黑色，0表示白色），

Network Saboteur Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 9706 Accepted: 4633 Description A university network is composed of N computers. System administrators gathered inform

Roadblocks Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 9479 Accepted: 3369 Description Bessie has moved to a small farm and sometimes enjoys returning to visit one of her best f

Wormholes Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 35456 Accepted: 12955 Description While exploring his many farms, Farmer John has discovered a number of amazing wormholes.

Silver Cow Party Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 14787 Accepted: 6687 Description One cow from each of N farms (1 ≤ N ≤ 1000) conveniently numbered 1..N is going to

Agri-Net Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 44549 Accepted: 18197 Description Farmer John has been elected mayor of his town! One of his campaign promises was to bring in