w571523631的博客

Description     John is going on a fishing trip. He has h hours available ( 1 <= h <= 16 ), and there are n lakes in the area (2 <= n <= 25), L1 , ..., Ln, all reachable along a single, one-w

Description Abstract Communication Mastership (ACM) is a software company that develops a unique social networkcalled tWinter. Each tWinter user has a handle that starts with a commercial at (‘@’) c