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Cod sursa(job #363641)
#include <fstream.h>
ifstream fin("cifra.in");
ofstream fout("cifra.out");
unsigned long long long long long long long n,t,i,q,c,s;
int main(){
fin>>t;
for (i=1;i<=t;i++){
fin>>n;
s=0;
while (n>0){
c=1;
q=1;
while (q<=n){
c=c*n;
q++;
}
s=s+c;
n=n-1;
}
fout<<s%10<<'\n';
}
fin.close();
fout.close();
return 0;
}