int main(int argc, char* argv[])
{
	int a[100],n,i;
	double	sum1=0,sum2=0,sum3=0,sum4=0;
	scanf("%d",&n);
	for(i=0;i<n;i++)
		scanf("%d",&a[i]);
	for(i=0;i<n;i++)
	{
		if(a[i]<=18)
			sum1=sum1+1;
		else if(19<=a[i]&&a[i]<=35)
			sum2=sum2+1;
		else if(36<=a[i]&&a[i]<=60)
			sum3=sum3+1;
		else
		    sum4=sum4+1;
	}
	printf("1-18: %.2lf%%\n",(double)(sum1/n*100));
	printf("19-35: %.2lf%%\n",(double)(sum2/n*100));
	printf("36-60: %.2lf%%\n",(double)(sum3/n*100));
	printf("60??: %.2lf%%\n",(double)(sum4/n*100));	
	return 0;
}
