#include<stdio.h>
int main()
{
    int N,M;
    scanf("%d%d",&N,&M);
    int a[N],i,c=0,s=0,x;
    for(i=0; i<N; i++)
    {
       scanf("%d",&a[i]);
       s+=a[i];

    }
    x=s/(4*M);

    for(i=0;i<N;i++)
    {
        if(a[i]<x)
            continue;
        else
            c++;
    }
    (c>=M)?printf("Yes\n"):printf("No\n");

    return 0;


}
