分类：图论
POJ3660 Cow Contest(Floyd,传递闭包)
题目： Cow Contest Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 10767 Accepted: 5996 Description N …
POJ2240 Arbitrage（floyd找正环）
题目： Arbitrage Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 22203 Accepted: 9427 Description Arbi…