#include<stdio.h>
int main()
{
    int n, m, sum=0, count=0, i, z, a;
    scanf("%d %d", &n, &m);

    int arr[n];

    for(i=0; i<n; i++)
    {
        scanf("%d", &arr[i]);
        sum = sum + arr[i];
    }
    a = 4*m;

    z = sum/a;

    for(i=0; i<n; i++)
    {
        if(arr[i]>=z)
        {
            count++;
        }
    }

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

    return 0;
}
