这道题后3个测试点错了，求指点

#include <iostream> 
using namespace std;
int main()
{
	int n,a,b,c;
	cin>>n>>a>>b>>c;
	if(n<=3)
	{
		if(a<b&&a<c)
		{
			cout <<"library";
		}
		else if(b<c)
		{
			cout <<"comprehensive";
		}
			else 
			{
				cout <<"art";
			}
	}
	if(n<=5)
	{
		if(b>c)
		{
			cout<<"art";
		}
		else
		{
			cout<<"comprehensive";
		}
	}
	if(n==9)
	{
		cout<<"art";
	}
}