int main(){
	int i;
	double n,a,b,c,d;
	a=0;
	b=0;
	c=0;
	d=0;
	scanf("%lf",&n);
	int s[100];
	for(i=0;i<n;i++){
		scanf("%d",&s[i]);
		if(s[i]>=1&&s[i]<=18)
			a++;
		else if(s[i]>=19&&s[i]<=35)
			b++;
		else if(s[i]>=36&&s[i]<=60)
			c++;
		else
			d++;
	}
	a=a/n*100;
	b=b/n*100;
	c=c/n*100;
	d=d/n*100;
	printf("1-18: %.2lf%%\n19-35: %.2lf%%\n36-60: %.2lf%%\n60??: %.2lf%%\n",a,b,c,d);
	return 0;
}
		

