#include <stdio.h>
#include <string.h>
#include <stdbool.h>

int a[105];

int main() {
    int n, m;
    scanf("%d %d", &n, &m);
    int cnt = 0;
    for (int i = 0; i < n; i++) {
        scanf("%d", a + i);
        cnt += a[i];
    }
    int ans = 0, nd = (cnt - 1) / (4 * m) + 1;
    for (int i = 0; i < n; i++) {
        if (a[i] >= nd) ans++;
    }
    if (ans < m)
        printf("No\n");
    else
        printf("Yes\n");
}