1045.java

import java.io.IOException;
import java.util.Scanner;

public class Main {
 
    public static void main(String[] args) throws IOException {
 
        double A, B, C, temp;
        Scanner sc = new Scanner(System.in);
        
        A = sc.nextDouble();
        B = sc.nextDouble();
        C = sc.nextDouble();
        
        if (A < B) {
            temp = A;
            A = B;
            B = temp;
        }
        
        if (A < C) {
            temp = A;
            A = C;
            C = temp;
        }
        
        if (B < C) {
            temp = B;
            B = C;
            C = temp;
        }

        if ( A >= (B+C) ) {
            System.out.println("NAO FORMA TRIANGULO");
        } else {
            if ( A*A == (B*B + C*C) ) {
                System.out.println("TRIANGULO RETANGULO");
            } else if ( A*A > (B*B + C*C) ) {
                System.out.println("TRIANGULO OBTUSANGULO");
            } else {
                System.out.println("TRIANGULO ACUTANGULO");
            }
            
            if (A==B && B==C) {
                System.out.println("TRIANGULO EQUILATERO");
            } else if (A==B || B==C || A==C) {
                System.out.println("TRIANGULO ISOSCELES");
            }
        }

    }
 
}