#include using namespace std;

int main() { int 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) { cout << "Not triangle" << endl; return 0;//撤离失败 } if(a * a + b * b == c * c) cout << "Right triangle" << endl; if(a * a + b * b > c * c) cout << "Acute triangle" << endl; if(a * a + b * b < c * c) cout << "Obtuse triangle" << endl; if((a == b || a == c)||(c == b || a == c)||(a == b || b == c)) cout << "Isosceles triangle" << endl; if(a == b && a == c && b == c) cout << "Equilateral triangle" << endl; return 0; }