#include <stdio.h>
#include <stdlib.h>

int main()
{
    int n,m,i,num;
    float s;
    
    scanf("%d %d",&n,&m);
    
    num = 0;
    s = 0.0;
    
    int a[n];
    
    for(i = 0;i < n;i++)
	{
        scanf("%d",&a[i]);
        
        s += a[i];
    }
    
    s /= 4.0 * (float)m;
    
    for(i = 0;i < n;i++)
	{
        if(a[i] >= s)
            num++;
            
        if(num == m)
            break;
    }
    
    printf("%s\n",num == m?"Yes":"No");
    
    return 0;
}