int main()
{
	int n=0,a=0,b=0,c=0,d=0;
	scanf("%d",&n);
	for(int i=0;i<n;i++)
	{
		int age;
		scanf("%d",&age);
			if(age<=18)
				a=a+1;
			else if(age>=19&&age<=35)
				b=b+1;
			else if(age>=36&&age<=60)
				c=c+1;
			else if(age>=61)
				d=d+1;
	}
	printf("1-18: %.2f%%\n",(float)a*100/n);
	printf("19-35: %.2f%%\n",(float)b*100/n);
	printf("36-60: %.2f%%\n",(float)c*100/n);
	printf("60??: %.2f%%\n",(float)d*100/n);
	return 0;
}
