text: #include <stdio.h>
  
  int main(void) {
      float a, b, c, tmp;
      scanf("%f%f%f", &a, &b, &c);
  
      if (a < b) tmp = a, a = b, b = tmp;
      if (b < c) tmp = b, b = c, c = tmp;
      if (a < b) tmp = a, a = b, b = tmp;
  
      if (a >= b + c) printf("NAO FORMA TRIANGULO\n");
      
      else {
          a *= a, b *= b, c *= c;
          if (a == (b + c)) printf("TRIANGULO RETANGULO\n");
          if (a > (b + c)) printf("TRIANGULO OBTUSANGULO\n");
          if (a < (b + c)) printf("TRIANGULO ACUTANGULO\n");
          if (a == b && a == c) printf("TRIANGULO EQUILATERO\n");
          else if (a == b || b == c || c == a) printf("TRIANGULO ISOSCELES\n");
      }
  
      return 0;
  }
  