int main(int argc, char* argv[])
{
 int i,n,count1,count2,count3,count4;
 int a[101];
 memset(a,0,sizeof(a));
 i=count1=count2=count3=count4=0;
 scanf("%d",&n);
 for(i=0;i<n;i++)
	 scanf("%d",&a[i]);
 for(i=0;i<n;i++){
	 if(1<=a[i]&&a[i]<=18)
       count1++;
 }
 for(i=0;i<n;i++){
	 if(19<=a[i]&&a[i]<=35)
       count2++;
 }
 for(i=0;i<n;i++){
	 if(36<=a[i]&&a[i]<=60)
       count3++;
 }
 for(i=0;i<n;i++){
	 if(a[i]>60)
       count4++;
 }
 printf("1-18: %.2f%%\n",(double)count1/n*100);
printf("19-35: %.2f%%\n",(double)count2/n*100);
printf("36-60: %.2f%%\n",(double)count3/n*100);
printf("60??: %.2f%%\n",(double)count4/n*100);

	return 0;
}

