Compilare: user.cpp: In member function ‘void collar::read()’: user.cpp:16: warning: unused variable ‘aux’ user.cpp: In member function ‘int collar::solve()’: user.cpp:31: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result