#include <bits/stdc++.h>

using std::cin;
using std::cout;

int main() {
	int n, s;
	cin >> n >> s;
	
	if (n == 1) {
		if (25 <= s and s < 30) puts("Yes");
		else puts("No"); 
		return 0;
	}
	
	puts(s/29 <= n and s/25 <= n ? "Yes" : "No");
	
	return 0;
}