import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int m = scanner.nextInt();
        int sum = 0;
        int vote = 0;
        int[] a = new int[n];
        for(int i = 0; i < n; i++){
            a[i] = scanner.nextInt();
            vote += a[i];
        }
        for(int i = 0; i < n; i++){
            if(a[i] >= (double)vote/(4*m)){sum++;}
        }
        if(sum >= m){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        return;
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz