#include <stdio.h>

int main()
{
    int i;
    int n, m;
    int count = 0, sum = 0;
    float popular;
    int a[1000];

    scanf("%d%d", &n, &m);

    for (i = 0; i < n; i++) {
        scanf("%d", &a[i]);
        sum += a[i];
    }

    popular = (float)sum / 4 / m;

    for (i = 0; i < n; i++) {
        if (a[i] >= popular) {
            count++;
        }
    }

    if (count >= m)
        printf("Yes\n");
    else 
        printf("No\n");
    
    return 0;
}