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Cod sursa(job #523858)
#include<fstream>
using namespace std;
long long n,i,j,p,x;
int functie(int n)
{
int i;
long us=0,up=1;
us=0;
for (i=1 ;i<=n;i++)
{
up=1;
for (j=1;j<=i;j++)
up= up*i%10;
us=(us+up) % 10;
}
return us;
}
int main()
{
ifstream f("cifra.in");
ofstream g("cifra.out");
f>>n;
for(i=1;i<=n;i++)
{
f>>x;
p=functie(x);
g<<p<<"\n";
}
return 0;
}