#include <stdio.h>

int main(void)
{
    int n, i, a[100000], m, b = 0, not = 0;

    scanf("%d%d", &n, &m);
    if (n > m)
    {
        for (i = 1; i <= n; i++)
        {
            scanf("%d", &a[i]);
            b += a[i];
        }

        for (i = 1; i <= n; i++)
        {
            if (a[i] < (b / (4 * m)))
            {
                not++;
            }
        }
        if (n - not < m)
        {
            printf("No\n");
        }
        else
        {
            printf("Yes\n");
        }
    }else{
        printf("No\n");
    }
    return 0;
}