#include<stdio.h>
int main()
{
    int n,m,i,x,count=0,y;
    scanf("%d %d",&n,&m);
    int a[n];
    for(i=0;i<n;i++)
    {
        scanf("%d",&a[i]);
        count=count+a[i];
    }
    y=count;
    count=0;
    x=(y+4*m-1)/(4*m);

    for(i=0;i<n;i++)
    {

        if(x<=a[i])
            {

                count++;
            }

    }

    if(count>=m)
    {
        printf("Yes");
    }
    else
    {
        printf("No");
    }
}
