using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var s = int.Parse(line[0]);
        var t = int.Parse(line[1]);
        var c = line[2];
        bool ans;
        if (c == ">") ans = s > t;
        else if (c == "<") ans = s < t;
        else ans = s == t;
        Console.WriteLine(ans ? "YES" : "NO");
    }
}