#include <math.h>
#include <stdio.h>
#include <string.h>
int n, a[101], m, ans, total = 0, count = 0;
double per, temp;
int main(void) {
    scanf("%d %d", &n, &m);
    for (int i = 0; i < n; i++) {
        scanf("%d", &a[i]);
    }
    per = 1 / (m * 4);
    for (int i = 0; i < n; i++) {
        total = total + a[i];
    }
    for (int i = 0; i < n; i++) {
        if ((double)a[i] / total >= per) {
            count = count + 1;
        }
    }
    if (count >= m) {
        printf("Yes\n");
    } else {
        printf("No\n");
    }
}