bee1045.cpp

/*
 * Contest : Beecrowd
 * Problem : 1045 - Tipos de Triângulos
 * Link    : https://judge.beecrowd.com/pt/problems/view/1045
 */

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

#define fastio ios::sync_with_stdio(0); cin.tie(0);

int main() {
  fastio

  float in[3];
  cin >> in[0] >> in[1] >> in[2];
  sort(in, in + 3);
  float a = in[2], b = in[1], c = in[0];
  float aa = a * a, aux = b * b + c * c;

  if (a >= b + c) {
    cout << "NAO FORMA TRIANGULO\n";
    return 0;
  }
  if (aa == aux) cout << "TRIANGULO RETANGULO\n";
  else if (aa > aux) cout << "TRIANGULO OBTUSANGULO\n";
  else
    cout << "TRIANGULO ACUTANGULO\n";

  set<float> s = {a, b, c};
  if (s.size() == 1) cout << "TRIANGULO EQUILATERO\n";
  else if (s.size() == 2) cout << "TRIANGULO ISOSCELES\n";

  return 0;
}