Cod sursa(job #1493247)

Utilizator MrTudorTudor Savulescu MrTudor Data 28 septembrie 2015 21:42:50
Problema Sum Scor 85
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.46 kb
#include<fstream>
using namespace std;
ifstream in("sum.in");
ofstream out("sum.out");
long long n,phi[100000];
void ciur()
{
 long long i,j;
 for(i=1;i<=100000;i++)
    phi[i]=i;
 for(i=2;i<=100000;i++)
    if(phi[i]==i)
       for (j=i; j<=100000; j+=i)
      {phi[j]/=i;
      phi[j]*=(i-1);}}
int main()
{long long t,x,solutie;
in>>t;
ciur();
 for(long i=1;i<=t;++i)
  {in>>x;
   solutie=2*phi[x]*x;
   out<<solutie<<'\n';}
 return 0;
}