def main():
    S, T, c = input().split()
    TF = None
    match c:
        case "<":
            TF = int(S) < int(T)
        case ">":
            TF = int(S) > int(T)
        case "=":
            TF = int(S) == int(T)
        case _:
            raise ValueError

    if TF:
        print("YES")
    else:
        print("NO")


if __name__ == "__main__":
    main()