#include <stdio.h>

int main(void)
{
    int i, M, N, A[i], sum = 0, a = 0;
    scanf("%d %d", &N, &M);
    for (i = 0; i < N; i++)
    {
        scanf("%d ", &A[i]);
        sum = sum + A[i];
    }
    for (i = 0; i < N; i++)
    {
        if (A[i] >= (sum / (4 * M)))
        {
            a++;
        }
    }
    if (a >= M)
    {
        printf("Yes\n");
    }
    else
    {
        printf("No\n");
    }

    return 0;
}