Cod sursa(job #1761776)

Utilizator patcasrarespatcas rares danut patcasrares Data 22 septembrie 2016 20:45:09
Problema Sum Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.64 kb
#include <cstdio>
#include <algorithm>
#include <vector>
#include <bitset>
#define INF 2140000000
#define MaxN 100001
#define MaxX 100001
using namespace std;


int N,X,v[MaxX];
bitset <MaxX> p;
int main()
{
    freopen("sum.in","r",stdin);
    freopen("sum.out","w",stdout);
    for(int i=2;i<=MaxX;i++)
        v[i]=i;
    for(int i=2;i<MaxX;i++)
        if(!p[i])
        {
            v[i]=i-1;
            for(int j=i*2;j<MaxX;j+=i)
                v[j]=v[j]/i*(i-1),p[j]=1;
        }
    scanf("%d",&N);
    for(int i=1;i<=N;i++)
    {
        scanf("%d",&X);
        printf("%lld\n",1LL*2*X*v[X]);
    }
    return 0;
}