gustavo

#include <iostream>
using namespace std;
int main(){
    double a,b,c,aux;
    cin>>a>>b>>c;
    if(a>b&&b>c)
        a=a;
    else if(b>a&&a>c){
        aux=a;
        a=b;
        b=aux;
    }else{
        aux=a;
        a=c;
        c=aux;
    }
    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;
    if(a==b&&c!=a||c==b&&b!=a||a==c&&a!=b)
        cout<<"TRIANGULO ISOSCELES"<<endl;
    }
    return 0;
}