int main(){
	long n,m,i;
  	long *data,total=0,count=0;
  	double cutOff;
  	scanf("%ld%ld",&n,&m);
  	data=(long int*)malloc(sizeof(long int)*n);
  
  	for(i=0;i<n;i++){
    	scanf("%ld",&data[i]);
      	total+=data[i];
    }
  	cutOff=total/(4.0*m);
  
  	for(i=0;i<n;i++){
    	if(data[i]>=cutOff)
          	count+=1;
    }
  
  	if(count>=m)
      	printf("Yes");
  	else
      	printf("No");
  
}