fun main(args: Array<String>) {
    val inpt = readLine()!!.split(" ")
    val (s,t) = inpt.dropLast(1).map { it.toInt() }
    val ans = when(inpt.last()[0]) {
        '<' -> {
            s < t
        }
        '>' -> {
            s > t
        }
        else -> {
            s == t
        }
    }
    println(if(ans) "YES" else "NO")
}