C++ :

#include<iostream>
using namespace std;
int main()
{
	int a,b,c;
	cin>>a>>b>>c;
	if (a+b>c and a+c>b and c+b>a)
	{
		cout<<"yes"<<endl;
		if (a==b or a==c or c==b)
		{
			cout<<"dengyao"<<endl;
			if (a==b and a==c and b==c)
			{
				cout<<"dengbian";
			}
		}
	}
	else 
		cout<<"no";
}