#include <stdio.h>
     
    int main(int argc, char args[])
    {
    	int n,m;
      	int selected = 0;
      	int total_votes = 0;
      
      	scanf("%d %d", &n, &m);
      	int arr[n];
      
      	for (int i = 0; i < n; i++)
        {
			scanf("%d ", &arr[i]);
          	total_votes += arr[i];
        }
      
      	for (int i = 0; i < n; i++)
        {
        	if (arr[i] >= (total_votes / (4*m)))
            {
            	selected++;
            }
        }
      	
      	if (selected >= m)
        {
        	printf("Yes");
        }
      	else
        {
        	printf("No");
        }
          
      	return 0;
    }