#include<stdio.h>
int main()
{
    int n,m,count=0,vote=0,i;
    scanf("%d %d",&n,&m);
    int a[100];
    for(i=0;i<n;i++)
    {
        scanf("%d",&a[i]);
        vote=vote+a[i];
    }
    vote=ceil((vote/(4*m)));
    for(i=0;i<n;i++)
    {
        if(a[i]>=vote)
            count++;
    }
    if(count>=m)
        printf("Yes\n");
    else
        printf("No\n");
    return 0;
}
