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({
    print($0)
    print(sumVotes)
    print(sumVotes/(4*M))
    print($0 >= sumVotes/(4*M))
    return $0 >= sumVotes/(4*M)
})

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