int main()
{
	int a,age,n1=0,n2=0,n3=0,n4=0,i;
	double b1,b2,b3,b4;
	scanf("%d",&a);
	for(i=0;i<a;i++)
	{
		scanf("%d",&age);
		if(age<=18)
		{
			n1++;
		}
		if(age>18&&age<=35)
		{
			n2++;
		}
	    if(age>35&&age<=60)
		{
			n3++;
		}
	    if(age>60)
		{
			n4++;
		}
	}
	b1=(double)n1/a*100;
	b2=(double)n2/a*100;
	b3=(double)n3/a*100;
	b4=(double)n4/a*100;
	printf("1-18: %.2lf%%",b1);
	printf("\n");
	printf("19-35: %.2lf%%",b2);
	printf("\n");
	printf("36-60: %.2lf%%",b3);
	printf("\n");
	printf("60??: %.2lf%%",b4);
	return 0;
}