int main()
{
	int n,i;
	double a,b,c,d;
	a=0;
	b=0;
	c=0;
	d=0;
	int age;
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		scanf("%d",&age);
		if(age<=18)
			a++;
		else if(age<=35)
			b++;
		else if(age<=60)
			c++;
		else 
			d++;
	}
	a=(double)a/n*100;
	b=(double)b/n*100;
	c=(double)c/n*100;
	d=(double)d/n*100;
	printf("1-18: %.2lf%%\n19-35: %.2lf%%\n36-60: %.2lf%%\n60??: %.2lf%%",a,b,c,d);
	return 0;
}