Eroare de compilare: user.cpp:10:6: error: ‘vector’ in namespace ‘std’ does not name a template type std::vector < int > g[MAXN]; ^~~~~~ user.cpp: In function ‘void dfs2(int)’: user.cpp:34:20: error: ‘g’ was not declared in this scope for (auto &y : g[x]) { ^ user.cpp: In function ‘void dfs1(int)’: user.cpp:46:20: error: ‘g’ was not declared in this scope for (auto &y : g[x]) { ^ user.cpp: In function ‘int main()’: user.cpp:60:9: error: ‘g’ was not declared in this scope g[a[i]].push_back(i); ^ user.cpp:56:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:59:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &a[i], &b[i]); ^ user.cpp:77:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &x); ^