Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:31:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[x].size();i++){ ^ user.cpp: In function ‘int maxim()’: user.cpp:48:11: warning: ‘retine’ may be used uninitialized in this function [-Wmaybe-uninitialized] return retine; ^ user.cpp: In function ‘int main()’: user.cpp:54:23: warning: ‘retine’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<C[maxim()]+1; ^ user.cpp:53:20: warning: ‘retine’ may be used uninitialized in this function [-Wmaybe-uninitialized] BFS(maxim()); ^