Compilare: user.cpp: In function ‘bool Valid(std::vector<int, std::allocator<int> >)’: user.cpp:20: warning: comparison between signed and unsigned integer expressions user.cpp:22: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void Normalize(std::vector<int, std::allocator<int> >&)’: user.cpp:31: warning: comparison between signed and unsigned integer expressions user.cpp:32: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void Build_Conf(std::vector<int, std::allocator<int> >&)’: user.cpp:37: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void Build_States(std::vector<int, std::allocator<int> >&)’: user.cpp:56: warning: comparison between signed and unsigned integer expressions user.cpp:58: warning: comparison between signed and unsigned integer expressions user.cpp:61: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:112: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:113: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:115: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result