#include<stdio.h>

int main()
{
    int n,m;
    scanf("%d %d",&n,&m);
    int arr[n];
    int sum=0;
    for(int i=0;i<n;i++){
        scanf("%d",&arr[i]);
        sum+=arr[i];
    }
    double min=(double)sum/(4*m);
    int count=0;
    for(int i=0;i<n;i++)
    {
        if(arr[i]>=min)
        count++;
        if(count==m)
        break;
    }
    if(count==m)
    printf("Yes");
    else 
    printf("No");
}
