#include<iostream>
using namespace std;
int main()
{
	int a,b,c,d;
	cin>>a>>b>>c;
	d=c;
	c=max(a,c);
	if(d!=c)a=d;
	c=max(b,c);
	if(d!=c)b=d;
	if(a+b<=c)
	{
		cout<<"Not triangle";
		return 0;
	} 
	if(a*a+b*b>c*c)
	{
		cout<<"Acute triangle"<<endl;
	}
	if(a*a+b*b==c*c)
	{
		cout<<"Right triangle"<<endl;
	}
	if(a*a+b*b<c*c)
	{
		cout<<"Obtuse triangle"<<endl;
	}
	if(a==b||a==c||b==c)
	{
		cout<<"Isosceles triangle"<<endl;
	}
	if(a==b&&a==c)
	{
		cout<<"Equilateral triangle"<<endl;
	}
	return 0;
}

为啥错了