Eroare de compilare: user.cpp: In function ‘bool eval_term(std::pair<int, int>, int*)’: user.cpp:18: error: ‘abs’ was not declared in this scope user.cpp: In function ‘bool ok_sol(int)’: user.cpp:44: warning: comparison between signed and unsigned integer expressions user.cpp:45: error: ‘abs’ was not declared in this scope user.cpp:31: warning: unused variable ‘punQ’ user.cpp: In function ‘int main()’: user.cpp:94: error: ‘abs’ was not declared in this scope user.cpp:85: warning: unused variable ‘j’ user.cpp:87: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:88: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:90: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:92: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result