1045.cpp

#include <iostream>

using namespace std;

int main(){
    double a,b,c;

    cin >> a >> b >> c;

    if(a >= (b+c) || b >= (a+c) || c >= (a+b))
         cout << "NAO FORMA TRIANGULO\n";
    else if(a*a == (b*b + c*c) || b*b == (a*a + c*c) || c*c == (a*a + b*b))
           cout << "TRIANGULO RETANGULO\n";
    else if(a*a > (b*b + c*c) || b*b > (a*a + c*c) || c*c > (a*a + b*b))
           cout << "TRIANGULO OBTUSANGULO\n";
    else if(a*a < (b*b + c*c) || b*b < (a*a + c*c) || c*c < (a*a + b*b))
           cout << "TRIANGULO ACUTANGULO\n";
    if(a == b && a == c)
            cout << "TRIANGULO EQUILATERO\n";
    if((a == b && a != c)  || (a == c && a != b) || (b == c && b != a))
            cout << "TRIANGULO ISOSCELES\n";

    return 0;

}