Cod sursa(job #1875667)

Utilizator mircearoataMircea Roata Palade mircearoata Data 11 februarie 2017 13:57:54
Problema Sum Scor 85
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.63 kb
#include <iostream>
#include <fstream>
#include <bitset>

using namespace std;

string problema = "sum";

ifstream in("sum.in");
ofstream out("sum.out");

int n,x;
long long euler[100001];

int main()
{
    in>>n;
    for(int i = 1;i<=100000;i++)
        euler[i]=i;
    for(int i = 2; i<=100000; i++)
    {
        if(euler[i]==i)
        {
            for(int j = 1; j<=100000/i; j++)
            {
                euler[i*j]/=i;
                euler[i*j]*=(i-1);
            }
        }
    }
    for(int i = 1; i<=n; i++)
    {
        in>>x;
        out<<x*2*euler[x]<<'\n';
    }
    return 0;
}