#!/usr/bin/env python3
import sys


def main():
    l = input().split()
    S = int(l[0])
    T = int(l[1])
    c = l[2]
    print("YES" if (S == T and c == "=") or (S > T and c == ">") or (S < T and c == "<") else "NO")
    return

if __name__ == '__main__':
    main()