using System;

class Program
{
    static void Main()
    {
        long N, S;
        {
            var sp = Console.ReadLine().Split();
            N = long.Parse(sp[0]);
            S = long.Parse(sp[1]);
        }

        // N = 1 は特例
        if (N == 1)
        {
            if (25 <= S && S <= 29) Console.WriteLine("Yes");
            else Console.WriteLine("No");
            return;
        }

        // N >= 2
        // 求める x の範囲：max(25, S - 29*(N-1)) ～ min(29, S)
        long left = Math.Max(25, S - 29 * (N - 1));
        long right = Math.Min(29, S);

        if (left <= right) Console.WriteLine("Yes");
        else Console.WriteLine("No");
    }
}