Compilare: user.cpp: In function ‘void dfs(std::vector<int>*, int)’: user.cpp:29:9: warning: unused variable ‘vecini’ [-Wunused-variable] int vecini = G[node].size(); ^ user.cpp: In function ‘int main()’: user.cpp:45:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fp, "%d%d", &N, &M); ^ user.cpp:53:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fp, "%d%d", &x, &y); ^