yingxi

Description Farmer John dutifully checks on the cows every day. He traverses some of the M (1 <= M <= 50,000) trails conveniently numbered 1..M from pasture 1 all the way out to pasture N (a jo

Wormholes Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 33948   Accepted: 12376 Description While exploring his many farms, Farmer John has discovered a nu