import java.util.Scanner;
public class Main {
    public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int m = sc.nextInt();
    int[]a = new int[n];
 
    int all = 0;
    for(int i=0; i<n; i++){
        a[i] = sc.nextInt();
        all += a[i];
    }
    int cou = 0;
    for(int i=0; i<n; i++){
        if(a[i] >= (double)all/(4*m)) {
        	cou++;
        }
    }
       if(cou>=m) {
    	   System.out.println("Yes");
       }else {
    	   System.out.println("No");
       }
    }
}

/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