To think of a beautiful problem description is so hard for me that let's just drop them off. :) Given four integers a,m,n,k,and S = gcd(a^m-1,a^n-1)%k,calculate the S.
输入解释
The first line contain a t,then t cases followed. Each case contain four integers a,m,n,k(1<=a,m,n,k<=10000).