
int main(int argc, char* argv[])
{
	int a[100],i,n;
	int b=0,c=0,d=0,e=0;
	double f,g,h,j;

	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		scanf("%d",&a[i]);

	}
	for(i=0;i<n;i++)
	{
		if(a[i]<=18)
		
			b++;
		
		if(a[i]>=19&&a[i]<=35)
			c++;
		if(a[i]>=36&&a[i]<=60)
			d++;
		if(a[i]>=61)
			e++;
	}
	f=(double)b/n*100;
	g=(double)c/n*100;
	h=(double)d/n*100;
	j=(double)e/n*100;
	printf("1-18: %.2lf%",f);
	printf("%%\n");
	printf("19-35: %.2lf%",g);
		printf("%%\n");
	printf("36-60: %.2lf%",h);
		printf("%%\n");
	printf("60??: %.2lf%",j);
		printf("%%\n");
	
	return 0;
}

