Eroare de compilare: user.cpp:7:8: error: expected constructor, destructor, or type conversion before ‘(’ token freopen("bfs.in","r",stdin); ^ user.cpp:8:8: error: expected constructor, destructor, or type conversion before ‘(’ token freopen("bfs.out","w",stdout); ^ user.cpp: In function ‘void bfs(int)’: user.cpp:24:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<G[u].size();j++) ~^~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:39:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&s); ^ user.cpp:42:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&u,&v); ^