#include <stdio.h>
int main()
{
    int N, M;
    int A[102];
    int C, D = 0;
    scanf("%d%d", &N, &M);
    for (int i = 0; i < N; i++)
    {
        scanf("%d", &A[i]);
        (C = C + A[i]);
    }
    for (int i = 0; i < N; i++)
    {
        if (A[i] >= C / (4 * M))
        {
            (D = D + 1);
        }
    }
    if (D >= M)

        printf("Yes\n");
    else
        printf("No\n");

    return 0;
}