Eroare de compilare: user.cpp: In function ‘void Solve()’: user.cpp:40: error: ‘BuildS’ was not declared in this scope user.cpp: In function ‘void Insert(std::string&)’: user.cpp:54: warning: NULL used in arithmetic user.cpp: In function ‘void Read()’: user.cpp:60: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:61: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void Print()’: user.cpp:80: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result