using namespace std;
int main()
{
	int a,b,c;
	cin>>a>>b>>c;
	if(a+b>c&&a+c>b&&b+c>a)
	{
		if(a*a+b*b==c*c||a*a+c*c==b*b||c*c+b*b==a*a)
		cout<<"Yes";
		else
		cout<<"No";
	}
	else
	cout<<"Not a triangle";
	return 0;
}