from sys import stdin


def main():
    input = lambda: stdin.readline()[:-1]
    S, T, C = input().split()

    S, T = map(int, [S, T])
    if S < T:
        c = "<"
    elif S > T:
        c = ">"
    else:
        c = "="

    if C == c:
        print("YES")
    else:
        print("NO")


main()