#include <stdio.h>

int main() {
        int n, m;
        int i;
        int a[100];
        int nr_vote = 0;
        int nr_fav = 0;

        if (scanf("%3d %3d", &n, &m) == 0) {
                perror("scanf");
                return 1;
        }

        for (i = 0; i < n; i++) {
                if (scanf("%4d", &a[i]) == 0) {
                        perror("scanf");
                        return 1;
                }
        }

        for (i = 0; i < n; i++) {
                nr_vote += a[i];
        }

        for (i = 0; i < n; i++) {
                if (a[i] * 4 * m >= nr_vote) {
                        nr_fav++;
                }
        }

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

        return 0;
}
