
#include<stdio.h>
int main()
{

int i,n,m;

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

double s[n];
double sum=0;
int c=0,x;
for(i=0;i<n;i++){

    scanf("%d",&x);
   s[i]=(double) x;
    sum+=s[i];
}

for(i=0;i<n;i++){
    if(s[i]>=(sum/(4*m)))
        c++;

}



if(c>=m)
    printf("Yes");
else
    printf("No");

}
