Eroare de compilare: user.cpp:7:1: error: expected initializer before ‘vector’ vector<int> adj[100001]; ^ user.cpp: In function ‘int BFS(int)’: user.cpp:17:25: error: ‘class std::stack<int>’ has no member named ‘front’ int current = q.front(); q.pop(); ^ user.cpp:19:25: error: ‘adj’ was not declared in this scope for(int child : adj[current]) ^ user.cpp: In function ‘int main()’: user.cpp:42:29: error: ‘v’ was not declared in this scope scanf("%d %d", &u, &v); ^ user.cpp:44:9: error: ‘adj’ was not declared in this scope adj[u].push_back(v); ^ user.cpp:49:35: error: ‘level’ was not declared in this scope printf("%d", level(BFS(BFS(1)))); ^ user.cpp:35:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("darb.in", "r", stdin); ^ user.cpp:36:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("darb.out", "w", stdout); ^ user.cpp:38:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &vertices); ^