
int main(int argc, char* argv[])
{
   int n,i;
   scanf("%d",&n);
   int age;
   int a=0,b=0,c=0,d=0;
   double aa=0,bb=0,cc=0,dd=0;
   for(i=1;i<n+1;i++)
   {
	   scanf("%d",&age);
       if(age<=18&&age>=1)
	   {
		   a++;
	   }
	   else if(age<=35&&age>=19)
	   {
		   b++;
	   }
	   else if(age<=60&&age>=36)
	   {
		   c++;
	   }
	   else
	   {
		   d++;
	   }
   }
        aa=((double)a/(double)n)*100;
		bb=((double)b/(double)n)*100;
		cc=((double)c/(double)n)*100;
		dd=((double)d/(double)n)*100;
		printf("1-18: %.2lf%%\n",aa);
		printf("19-35: %.2lf%%\n",bb);
		printf("36-60: %.2lf%%\n",cc);
		printf("60??: %.2lf%%\n",dd);
        return 0;
}
