Cod sursa(job #2129464)

Utilizator MoldovanAndrei1Moldovan Andrei MoldovanAndrei1 Data 12 februarie 2018 20:49:32
Problema Sum Scor 80
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.44 kb
#include <cstdio>
using namespace std;
int v[100005];
int main()
{
    freopen("sum.in","r",stdin);
    freopen("sum.out","w",stdout);
    int i;
    for(i=2;i<=100002;i++)v[i]=i;
    for(i=2;i<=100002;i++)
        if(v[i]==i)
        for(int j=i;j<=100000;j+=i)v[j]=v[j]*(i-1)/i;
    int n ,nr;
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    {
        scanf("%d",&nr);
        printf("%lld\n",1LL*2*nr*v[nr]);
    }
    return 0;
}