摘要：
Windy has a country, and he wants to build an army to protect his country. He has picked up N girls and M boys and wants to collect them to be his sol 阅读全文
摘要：
Farmer John has been elected mayor of his town! One of his campaign promises was to bring internet connectivity to all farms in the area. He needs you 阅读全文
摘要：
An earthquake takes place in Southeast Asia. The ACM (Asia Cooperated Medical team) have set up a wireless network with the lap computers, but an unex 阅读全文
摘要：
There are n cities numbered from 1 to n in Berland. Some of them are connected by two-way roads. Each road has its own length — an integer number from 阅读全文