Rikka with Phi Accepts: 5 Submissions: 66 Time Limit: 16000/8000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others) Problem Description Rikka and Yuta are interested in Phi function (which is known as Euler's totient function). Yuta giv…
Rikka with Graph Accepts: 123 Submissions: 525 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) 问题描述 众所周知,萌萌哒六花不擅长数学,所以勇太给了她一些数学问题做练习,其中有一道是这样的: 给出一张 nn 个点 n+1n+1 条边的无向图,你可以选择一些边(至少一条)删除. 现在勇太想知道有多少种方案使得删除之后图依然联通.…
Rikka with Chess Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 177 Accepted Submission(s): 161 Problem Description Yuta gives Rikka a chess board of size n×m. As we all know, on a chess boa…
BestCoder Round #7 Start Time : 2014-08-31 19:00:00 End Time : 2014-08-31 21:00:00Contest Type : Register Public Contest Status : Ended Current Server Time : 2014-08-31 21:12:12 Solved Pro.ID Title Ratio(Accepted / Submitted) 1001 Little Pony…