include [HTML_REMOVED]
using namespace std;
int main()
{
double a,b,c;
cin >> a >> b >> c;
if(a<b) swap(a, b);
if(a<c) swap(a, c);
if(b<c) swap(b, c);
if(a>=b+c)printf("NAO FORMA TRIANGULO\n");
else
{if(a*a==b*b+c*c)printf("TRIANGULO RETANGULO\n");
if(a*a>b*b+c*c)printf("TRIANGULO OBTUSANGULO\n");
if(a*a<b*b+c*c)printf("TRIANGULO ACUTANGULO\n");
if(a==b&&a==c)printf("TRIANGULO EQUILATERO\n");
if(a==b&&b!=c||b==c&&a!=b||a==c&&a!=b)printf("TRIANGULO ISOSCELES");
}
return 0;
}