Cod sursa(job #1881858)

Utilizator pimao2004Lupu Stefan Dragos pimao2004 Data 16 februarie 2017 19:52:14
Problema Sum Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.65 kb
#include <iostream>
#include <cstdio>
using namespace std;

long long primicuel[1000001];
int v[1000001];
int main()
{
    freopen("sum.in", "rt", stdin);
    freopen("sum.out", "wt", stdout);
    int i,n,m=0,j;
    scanf("%d", &n);
    for(i=1;i<=n;i++)
    {
        scanf("%d", &v[i]);
        m=max(v[i],m);
    }
    for(i=1;i<=m;i++)
    primicuel[i]=i;
    for(i=2;i<=m;i++)
    {
        if(primicuel[i]==i)
        for(j=i;j<=m;j+=i)
        {
            primicuel[j]/=i;
            primicuel[j]*=(i-1);
        }
    }
    for(i=1;i<=n;i++)
    {
        printf("%lld\n", v[i]*2*primicuel[v[i]]);
    }
    return 0;
}