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































