using System;

class Program
{
    static void Main(string[] args)
    {
        var input = Console.ReadLine().Split();
        var S = int.Parse(input[0]);
        var T = int.Parse(input[1]);
        var c = input[2];
        var ans = "NO";

        switch (c)
        {
            case "<": 
                if (S < T) ans = "YES";
                break;
            case ">":
                if (S > T) ans = "YES";
                break;
            case "=":
                if (S == T) ans = "YES";
                break;
            default:
                break;
        }
        Console.WriteLine(ans);
    }
}