
int main()
{  
	int n,i;
	double b=0,c=0,d=0,e=0;
	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]<=18)
		{
			b++;
		}
		else if(a[i]>=10&&a[i]<=35)
		{
			c++;
		}
		else if(a[i]>=36&&a[i]<=60)
		{
			d++;
		}
		else if(a[i]>=61)
		{
			e++;
		}
	}
		b=(double)b/n*100;
		c=(double)c/n*100;
        d=(double)d/n*100;
        e=(double)e/n*100;
		printf("1-18: " "%.2lf""%%\n",b);
        printf("19-35: " "%.2lf""%%\n",c);
        printf("36-60: " "%.2lf""%%\n",d);
        printf("60??: " "%.2lf""%%",e);
	return 0;
}