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Cod sursa(job #470154)
#include<fstream>
#include<math.h>
using namespace std;
int ultim(int n)
{
int ult=1;
for(int i=1;i<=n;i++)
ult=(ult*n)%10;
return ult;
}
int sumaUlt(int n)
{
if(n==0)
return 0;
else
return ultim(n)+sumaUlt(n-1);
}
int main()
{
ifstream fin;
ofstream fout;
fin.open("cifra.in");
fout.open("cifra.out");
int T, N;
int rez[10000];
fin>>T;
for(int i=1;i<=T;i++)
{
fin>>N;
fout<<sumaUlt(N)%10<<endl;
}
fin.close();
fout.close();
return 0;
}