#333 triunghi1

#include <iostream>

using namespace std;

int main()
{
    float  a,b,c,aux;
    cin>>a>>b>>c;
    if(a>b)
    {
        aux=a;
        a=b;
        b=aux;
    }
    if ( a>c)
    {
        aux=a;
        a=c;
        c=aux;
    }
     if ( b>c)
    {
        aux=b;
        b=c;
        c=aux;
    }
    
if (a+b<= c|| a+c<=b || b+c<=a)
    cout<< "nu este triunghi";
else
{

    if (c*c==a*a+b*b)
        cout<< "triunghi dreptunghic";
    else
        if ( (c*c<a*a+b*b))
        cout<< "triunghi ascutitunghic" ;
    else
        cout<< "triunghi obtuzunghic";
}

   return 0;
}