
int main(int argc, char* argv[])
{
	int a[105];
	int n,i;
	int e=0;
	int b=0;
	int c=0;
	int d=0;
	double e1,b1,c1,d1;
	scanf("%d",&n);
	for(i=0;i<n;i++)
		scanf("%d",&a[i]);
    for(i=0;i<n;i++)
	{if(a[i]<=18)  e++;
	else if(a[i]>18 && a[i]<=35)  b++;
	else if(a[i]>35 && a[i]<=60)  c++;
	else d++;
	}
	e1=(double)e/n*100;
	b1=(double)b/n*100;
    c1=(double)c/n*100;
    d1=(double)d/n*100;
	printf("1-18: %.2lf%%\n",e1);
    printf("19-35: %.2lf%%\n",b1);
	printf("36-60: %.2lf%%\n",c1);
    printf("60??: %.2lf%%\n",d1);
	return 0;
}

