Cod sursa(job #1778353)

Utilizator c0mradec0mrade c0mrade Data 13 octombrie 2016 18:40:35
Problema Sum Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.51 kb
#include<bits/stdc++.h>
using namespace std;

int v[100010];

int main()
{
    freopen("sum.in", "r", stdin);
    freopen("sum.out", "w", stdout);
    int n;
    scanf("%d", &n);
    for(int i=1;i<100001;++i) v[i]=i;
    for(int i=2;i<100001;++i)
        if(v[i]==i)
            for(int j=i;j<100000;j+=i)
                v[j]=v[j]/i*(i-1);
    while(n--)
    {
        int x;
        scanf("%d", &x);
        unsigned long long ans=2LL*x*v[x];
        printf("%llu\n", ans);
    }

    return 0;
}