Compilare: user.cpp: In member function ‘void DirectedGraph::dfs(int)’: user.cpp:14:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<adjList[parent].size();++i){ ^ user.cpp: In function ‘int main()’: user.cpp:46:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&n,&m); ^ user.cpp:49:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&from,&to); ^