#include <iostream>
#include <cmath>
using namespace std;
int main() {
    int a, b, c;
    cin >> a >> b >> c;
    int vtor_lift = abs(b - c) + c;
    
    if(a == vtor_lift) {
        cout << 0 << endl;
    }
    else if(a < vtor_lift) {
        cout << 1 << endl;
    }
    else {
        cout << 2 << endl;
    }
    return 0;
}