题目链接：http://poj.org/problem?id=1947  Rebuilding Roads Time Limit: 1000MS Memory Limit: 30000KTotal Submissions: 8566 Accepted: 3835 Description The cows have reconstructed Farmer John's farm,

Description The cows have reconstructed Farmer John’s farm, with its N barns (1 <= N <= 150, number 1..N) after the terrible earthquake last May. The cows didn’t have time to rebuild any extra road

题目：Rebuilding Roads The cows have reconstructed Farmer John's farm, with its N barns (1 <= N <= 150, number 1..N) after the terrible earthquake last May. The cows didn't have time to rebuild any extr