object Main extends App {
    val sc = new java.util.Scanner(System.in)

    var a = sc.nextInt
    var b = sc.nextInt
    var c = sc.nextInt
    val k = sc.nextInt

    var i = 0
    while(a >= b) {
        b *= 2
        i+=1
    }
    while(b >= c) {
        c *= 2
        i+=1
    }

    val ans = if (i <= k) "Yes" else "No"
    println(ans)
    
}