import java.util.*;
public class Main {
        public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            int n = sc.nextInt();
            int m = sc.nextInt();
            int total = 0;
            int [] votes = new int[n];
            for(int i = 0; i<n; i++){
                votes[i] = sc.nextInt();
                total += votes[i];
            }
            Arrays.sort(votes);
            double threshold = (double)1/(4*m)*(double)total;
            for(int i = votes.length-1; i>=n-m; i--){
                if(votes[i]<threshold) {
                    System.out.println("No");
                    return;
                }
            }
            System.out.println("Yes");
        }
    }

/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