int main()
{   double l,m,q,p;
double g=0,s=0,b=0,c=0;
	int n,i;
	int a[100];
	scanf("%d",&n);
	for(i=0;i<n;i++){
		scanf("%d",&a[i]);
	}
	for(i=0;i<n;i++){
	if(a[i]>=1&&a[i]<=18)s=s+1;
	if(a[i]>=19&&a[i]<=35)g=g+1;
	if(a[i]>=36&&a[i]<=60)b=b+1;
	if(a[i]>=61)c=c+1;
	}
    m=(g*100)/n;	l=(s*100)/n;
	q=(b*100)/n;
	p=(c*100)/n;
		printf("1-18: %.2lf%%\n",l);
			printf("19-35: %.2lf%%\n",m);
			printf("36-60: %.2lf%%\n",q);
printf("60??: %.2lf%%\n",p);

return 0;

}