#include <bits/stdc++.h>
#define endl "\n"
using namespace std;

int main() {
	cin.tie(nullptr)->ios_base::sync_with_stdio(false);
	long long a, b;
	cin >> a >> b;
	if((b / a) > 25 && (b / a) < 30) {
		cout << "Yes";
	} else cout << "No";
	return 0;
}