#include <stdio.h>

int main(void)
{
    int n, m;
    scanf("%d %d", &n, &m);
    int sth[n];
    int sum = 0;
    int count = 0;

    //scanf("%d %d", &n, &m);
    for (int i = 0; i < n; i ++){
        scanf("%d", &sth[i]);
        sum += sth[i];
    }
    
    for (int i = 0; i < n; i++){
        if (sth[i] >= ((float)sum / (4*m)))
            count++;
    }

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