#include<stdio.h>
#include<math.h>


int main()
{
    double sum2,sum3;
    int n,m,sum=0,count=0;
    scanf("%d%d\n",&n,&m);
    int i,a[100],sum4;
    for(i=0; i<n; i++)
    {
        scanf("%d",&a[i]);
        sum=sum+a[i];
    }
    sum2=sum/(4*m);
    sum3=ceil(sum2);
    sum4=sum3;
    for(i=0; i<n; i++)
    {
        if(a[i]>=sum3)
        {
            count++;
        }
        else
        {
            continue;
        }
    }
    if(count>=m)
    {
        printf("Yes\n");
    }
    else
    {
        printf("No\n");
    }



    return 0;
}
