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#include <iostream> using namespace std; int main() { int t,c=0; int MX; int L,M,N; unsigned long long sum,tmp; cin>>t; while(t--) { cin>>L>>M>>N; c++; MX=L*L; tmp=1; for(int i=M-1;i>=0;i--) { tmp=tmp*(MX-i); tmp%=10000000000007; } sum=0; for(int j=1;j<=N-M+1;j++) { sum+=tmp; sum%=10000000000007; tmp*=(MX-M+1-j); tmp%=10000000000007; } cout<<"Case "<<c<<": "; cout<<sum<<"\n"; } return 0; } |