Compilare: user.cpp: In function ‘void dfs(int, int, const std::vector<std::vector<int> >&, std::vector<int>&, std::vector<int>&, std::vector<int>&)’: user.cpp:65:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[cur].size(); ++i){ ^ user.cpp: In member function ‘int chunk_structure::find_in_chunks(int, int)’: user.cpp:33:20: warning: control reaches end of non-void function [-Wreturn-type] return i; } } } ^