import Foundation

let inputLine = readLine()!.components(separatedBy: " ").map({Int($0)!})
let N = inputLine[0]
let M = inputLine[1]

let inputLine2 = readLine()!.components(separatedBy: " ").map({Int($0)!})

let sumVotes = inputLine2.reduce(0){$0 + $1}
let popularItems = inputLine2.filter({ $0 >= sumVotes/4*M })

if popularItems.count >= M {
    print("Yes")
} else {
    print("No")
}