int main()
{
	int n,b[100],i;
	int sum1=0,sum2=0,sum3=0,sum4=0;
	scanf("%d\n",&n);
	for(i=0;i<n;i++){
		scanf("%d",&b[i]);
	}
	for(i=0;i<n;i++){
		if(b[i]<=18) sum1++;
		else if(b[i]>=19&&b[i]<=35) sum2++;
		else if(b[i]>=36&&b[i]<=60) sum3++;
		else sum4++;
	}
	double a,B,c,d;
	a=100*(double)sum1/n;
	B=100*(double)sum2/n;
	c=100*(double)sum3/n;
	d=100*(double)sum4/n;
	printf("1-18: %.2lf%%\n",a);
    printf("19-35: %.2lf%%\n",B);
    printf("36-60: %.2lf%%\n",c);
    printf("60??: %.2lf%%\n",d);
	return 0;
}

