#include <iostream>

using namespace std;
long long a,b,c
//string s1,s2;

int main(){
    cin >> a>> b >> c;
    if(a==b && b==c && a==c){
        cout << "1";
    }
    else if (a==b ||b==c||a==c){
        cout << "2";
    }
    else{
        cout <<"3";
    }
    return 0;
}