Cod sursa(job #2796207)

Utilizator BlaugranasEnal Gemaledin Blaugranas Data 7 noiembrie 2021 18:44:43
Problema Sum Scor 0
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.35 kb
Raporteaza aceasta sursa 
#include<fstream>
using namespace std;
ifstream F("sum.in");
ofstream G("sum.out");
int i,j,n,x,e[100001];
int main()
{
    for(i=2;i<=1e5;++i)
        e[i]=i;
    for(i=2;i<=1e5;++i)
        if(e[i]==i)
            for(j=i;j<=1e5;j+=i)
                e[j]*=(i-1)/i;
    for(F>>n;n;--n)
        F>>x,G<<1LL*e[x]*2*x<<'\n';
    return 0;
}