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Cod sursa(job #650044)
#include<iostream>
#include<fstream>
#include <math.h>
using namespace std;
int cifra_put(int num)
{
int i,put;
// num=num%100;
put=1;
for (i=1;i<=num;i++)
{
put=(put*num)%10;
}
return (put);
}
int main()
{
ifstream f("cifra.in");
ofstream g("cifra.out");
long long int i,t,s,j,nr,num;
f>>t;
for(i=1; i<=t; i++)
{
f>>nr;
nr=nr%1000;
s=0;
for(j=1; j<=nr; j++)
s=s+cifra_put(j);
s=s%10;
g<<s<<endl;
}
f.close();
g.close();
}