左眼皮跳跳

Problem Description为了训练小希的方向感，Gardon建立了一座大城堡，里面有N个房间(N Input输入包含多组数据，输入的第一行有两个数：N和M，接下来的M行每行有两个数a和b，表示了一条通道可以从A房间来到B房间。文件最后以两个0结束。 Output对于输入的每组数据，如果任意两个房间都是相互连接的，输出"Yes"，否则输出"No

Language:DefaultPopular CowsTime Limit: 2000MS Memory Limit: 65536KTotal Submissions: 24384 Accepted: 10007DescriptionEvery cow's dream is to become the mos

Language:DefaultKing's QuestTime Limit: 15000MS Memory Limit: 65536KTotal Submissions: 7635 Accepted: 2769Case Time Limit: 2000MSDescriptionOnce upon

Problem DescriptionThere are n princes and m princesses. Princess can marry any prince. But prince can only marry the princess they DO love.For all princes,give all the princesses that they love.

Road ConstructionTime Limit: 2000MS Memory Limit: 65536KTotal Submissions: 10191 Accepted: 5061DescriptionIt's almost summer time, and that means that it's al

Popular CowsTime Limit: 2000MS Memory Limit: 65536KTotal Submissions: 28016 Accepted: 11294DescriptionEvery cow's dream is to become the most popular cow in the h

Redundant PathsTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 11145 Accepted: 4774DescriptionIn order to get from one of the F (1 <= F <= 5,000) grazin