func main() {
    var abc = readLine()!.split(separator: " ").map{Int($0)!}
    var k = Int(readLine()!)!
    while abc[1] <= abc[0] {
        abc[1] *= 2
        k -= 1
    }
    while abc[2] <= abc[1] {
        abc[2] *= 2
        k -= 1
    }
    print(k>=0 ? "Yes" : "No")
}

main()