#include <iostream>

using namespace std;

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