void main()
{
	int n,age,m1=0,m2=0,m3=0,m4=0,q;
	double x1,x2,x3,x4;
	scanf("%d",&n);
	q=n;

	while(q>0){
		scanf("%d",&age);
		if(age<=18){
			m1++;
		}
		else if(age>=19&&age<=35){
			m2++;
		}
		else if(age>=36&&age<=60){
			m3++;
		}
		else if(age>=61){
			m4++;
		}
		else printf("data error\n");
		q--;
	}
	x1=(double)m1/(double)n*100;
	x2=(double)m2/(double)n*100;
	x3=(double)m3/(double)n*100;
	x4=(double)m4/(double)n*100;

	printf("1-18: %.2lf%%\n",x1);
	printf("19-35: %.2lf%%\n",x2);
	printf("36-60: %.2lf%%\n",x3);
	printf("60??: %.2lf%%\n",x4);
}


