#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main()
{
	int a, b, c, d;
	cin >> a >> b >> c >> d;
	b += 31;
	if (a + c <= b) cout << 1 << endl;
	else if (a + d <= b) cout << 2 << endl;
	else cout << 3 << endl;
}