spoj ETF (totient)

#include <bits/stdc++.h>
using namespace std;
#define test int t; cin>>t; while (t--)
#define ll long long int
#define fellow_junior  ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int phi(int n)
{
    int re=n;
    for(int i=2;i*i<=n;i++)
    {
        if(n%i==0)
        {
            while(n%i==0)
            {
                n/=i;
            }
            re-=(re/i);
        }
    }
    if(n>1) re-=(re/n);
    return re;
}
int main()
{
   fellow_junior

   test
   {
       ll a,c,d,f,i,j,k,l;
       cin>>a;
       cout<<phi(a)<<endl;
   }
   return 0;
}