int main()
{
	int s[100],i;
	float a=0,b=0,c=0,d=0,h[5],n;
	scanf("%f",&n);
	for(i=0;i<n;i++)
	{
		scanf("%d",&s[i]);
	}
	for(i=0;i<n;i++)
	{
		if(s[i]>=0&&s[i]<=18)
		{
			a+=1;
		}
		if(s[i]>=19&&s[i]<=35)
		{
			b+=1;
		}
		if(s[i]>=36&&s[i]<=60)
		{
			c+=1;
		}
		if(s[i]>=61)
		{
			d+=1;
		}
	}
	h[0]=a/n;
	h[1]=b/n;
	h[2]=c/n;
	h[3]=d/n;
	printf("1-18: %.2f%%\n",h[0]*100);
	printf("19-35: %.2f%%\n",h[1]*100);
	printf("36-60: %.2f%%\n",h[2]*100);
	printf("60??: %.2f%%\n",h[3]*100);

	return 0;
}

