foundamental

#include <iostream>
using namespace std;
double a , b , c , t;
int main()
{
    cin >> a >> b >> c;
    if (b > a)
    {
        t = a;
        a = b;
        b = t;
    }
    if (c > a)
    {
        t = a;
        a = c;
        c = t;
    }
    if (c > b)
    {
        t = b;
        b = c;
        c = t;
    }
    if (a >= b + c)
    {
        cout << "NAO FORMA TRIANGULO" << endl;
    }
    else
    {
        if (a * a == b * b + c * c) cout << "TRIANGULO RETANGULO" << endl;
        if (a * a > b * b + c * c) cout << "TRIANGULO OBTUSANGULO" << endl;
        if (a * a < b * b + c * c) cout << "TRIANGULO ACUTANGULO" << endl;
        if (a == b && b == c) cout << "TRIANGULO EQUILATERO" << endl;
        else if (a == b || b == c || c == a) cout << "TRIANGULO ISOSCELES" << endl;
    }
    return 0;
}