#include <iostream>
using namespace std;
// program reši linearno enačbo ax + b = 0

int main () {
double a,b;

 cout << "Vnesi koeficiente linearne enacbe: ";  cin >> a >> b;

if   (a != 0)
 	cout << "Resitev je enolicna: " <<  -b/a << endl;
else if (b == 0)
 	cout << "Identiteta! " << endl;
else
  	cout << "Protislovje! " << endl;
}