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Cod sursa(job #705412)
#include<iostream>
#include<fstream>
using namespace std;
int main(void)
{
unsigned long s=0,p=1;
int i,t,n,k,j;
char nr;
fstream f,g;
f.open("cifra.in",ios::in);
g.open("cifra.out",ios::out);
f>>t;
for(i=1;i<=t;i++)
{
f>>nr;
n=nr-48;
s=0;
for(j=1;j<=n;j++)
{
p=1;
for(k=1;k<=j;k++)
p=p*j;
s=s+p;
}
g<<s%10<<"\n";
}
f.close();
g.close();
}