Eroare de compilare: user.cpp:9:1: error: ‘vector’ does not name a type vector<int> a[maxn]; ^ user.cpp: In function ‘void read()’: user.cpp:20:9: error: ‘a’ was not declared in this scope a[x].push_back(y); ^ user.cpp: In function ‘void df(int)’: user.cpp:30:25: error: ‘a’ was not declared in this scope for (int i = 0; i < a[nod].size(); ++i) ^ user.cpp: In function ‘void read()’: user.cpp:14:32: 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:19:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &x, &y); ^