def main():
    S, T, c = map(str, input().split())
    S = int(S)
    T = int(T)

    comp = ""
    if S < T:
        comp = "<"
    elif S == T:
        comp = "="
    else:
        comp = ">"

    print("YES" if comp == c else "NO")


if __name__ == "__main__":
    main()