Cod sursa(job #878076)

Utilizator XeBluePodaru Mihai XeBlue Data 13 februarie 2013 21:33:11
Problema Sum Scor 95
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.49 kb
#include <fstream>
using namespace std;
#define inf 100001
int e[inf];
ifstream in("sum.in");
ofstream out("sum.out");
int main()
{
    int n, i, j, k;
    for(i=1;i<=inf;i++)
        e[i]=i;
    for(i=2;i<=inf;i++)
        if(e[i]==i)
            for(j=i;j<=inf;j+=i)
                e[j]=e[j]/i*(i-1);
    in >> n;
    for(i=1;i<=n;i++)
    {
        in >> k;
        out << (long long)e[k]*2*k;
        out << "\n";
    }
    in.close();
    out.close();
    return 0;
}