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Cod sursa(job #276771)
#include<fstream>
using namespace std;
long long sum;
void powersum (int n)
{
long long nr=1;
if (n>0) {
powersum (n-1);
for (int i=0;i<n;i++)
nr*=n;
sum+=nr;
}
}
int main()
{
int t,n;
ifstream input("cifra.in");
ofstream output("cifra.out");
input>>t;
for(int i=0;i<t;i++) {
input>>n;
sum=0;
powersum(n);
output<<(sum%10)<<endl;
}
input.close();
output.close();
return 0;
}