Compilare: user.cpp: In function ‘void DFS(int, std::list<int>*)’: user.cpp:20:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<adjMat2[start].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:36:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(pFin, "%d %d", &n, &m); ^ user.cpp:48:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(pFin, "%d %d", &a, &b); ^