Compilare: user.cpp: In function ‘void Dfs(int)’: user.cpp:54:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[u].size(); i++) ^ user.cpp: In constructor ‘Parser::Parser(const char*)’: user.cpp:13:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(b, SIZE, 1, fin); ^ user.cpp: In member function ‘void Parser::plusC()’: user.cpp:29:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(b, SIZE, 1, fin); ^