#include <bits/stdc++.h>
using namespace std;
int main() {
int t;
cin>>t;
for(int case_number=1;case_number<=t;++case_number){
int N;
cin>>N;
vector<unsigned long long>numbers(N);
for(auto &i:numbers){
cin>>i;
}
unsigned long long ans; //assume this is the answer
cout<<"Case #"<<case_number<<": "<<ans<<endl;
}
return 0;
}
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