Cod sursa(job #2933024)

Utilizator PsyDuck1914Feraru Rares-Serban PsyDuck1914 Data 4 noiembrie 2022 15:04:40
Problema Sum Scor 70
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.51 kb
#include <fstream>
#include <iostream>

using namespace std;

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

const int NMAX = 1e5;
int c[NMAX+1];

void precalcul(){
    for(int i=2; i<=NMAX; i++)
        c[i] = i;
    for(int i=2; i<=NMAX; i++)
        if(c[i] == i)
            for(int j=i; j<=NMAX; j+=i)
                c[j] = c[j]/i*(i-1);
        
}

int main()
{
    precalcul();
    int n;
    f>>n;
    for(int i=1; i<=n; i++){
        int k;
        f>>k;
        g<<c[k]*k*2<<"\n";
    }
    

    return 0;
}