Cod sursa(job #811125)

Utilizator dariusdariusMarian Darius dariusdarius Data 11 noiembrie 2012 15:54:59
Problema Sum Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.41 kb
#include<cstdio>
int i,j,n,x,e[100010];
int main()
{
    freopen("sum.in","r",stdin);
    freopen("sum.out","w",stdout);
    scanf("%d",&n);
    for(i=2;i<100000;i++)
        e[i]=i;
    for(i=2;i<100000;i++)
        if(e[i]==i)
            for(j=i;j<100000;j+=i)
                e[j]=e[j]/i*(i-1);
    for(i=1;i<=n;i++)
    {
        scanf("%d",&x);
        printf("%lld\n",(long long)e[x]*2*x);
    }
    return 0;
}