#include<stdio.h>
int main() {
    int n, m, vote = 0, count = 0, a[100];
    scanf("%d %d", &n, &m);
    for (int i = 0; i < n; i++)
    {
        scanf("%d", &a[i]);
    }
    for (int i = 0; i < n; i++)
    {
        total = total + a[i];
    }
    for (int i = 0; i < n; i++)
    {
        if (a[i] >= total / (4 * m))
        {
            count = count + 1;
        }

    }

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

    return 0;
}