#include <iostream>

using namespace std;

int main()
{
   int n = 3;
   int a[n];
   int j = 3;
   for( int i=0 ; i<n ; i++ )
   {
       cin >> a[i];
   }
   if( a[0] == a[1] && a[1] == a[2] )
   {
       cout << 1 << endl;
       
   }
   else if( a[0] == a[1] || a[1]==a[2] || a[0]==a[2])
   {
       cout <<2 << endl;
   }
   else
   {
       cout << 3 << endl;
   }
   return 0;
}