#include<stdio.h>

int main()

{
    int n, m, i, total_vote = 0, lim, count = 0;


    scanf("%d%d\n", &n, &m);
    int ara[n];
    for(i = 0; i<n; i++)
    {
        scanf("%d", &ara[i]);
        total_vote = total_vote + ara[i];
    }
    printf("\n");
    lim = total_vote/(4*m);
    for(i = 0; i<n; i++)
    {
        if(ara[i]>=lim) count++;
    }
  
    if(count < m) printf("No\n");
    else printf("Yes\n");

    return 0;


}
