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Cod sursa(job #240902)
#include<iostream.h>
#include<fstream.h>
int main()
{
ifstream input("cifra.in");
ofstream output("cifra.out");
long int t,n,sum,np;
input>>t;
for(int i=0;i<t;i++)
{
input>>n;
sum=0;
for (int j=1;j<=n;j++)
{
np=j;
for (int p=1;p<j;p++)
np=np*j;
sum+=np;
}
output<<sum%10<<endl;
}
input.close();
output.close();
return 0;
}