import java.util.*

/**
 * Created on 2019/03/03.
 */



fun main(args: Array<String>) {
    val sc = Scanner(System.`in`)
    val a = sc.next().toInt()
    val b = sc.next().toInt()
    val c = sc.next().toInt()
    val list = listOf(a, b, c).sorted()
    if (list[0] == list[2]) println("Yes") else println("No")
}
