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