Compilare: user.cpp: In function ‘int bfs(int, int, int*, std::vector<int>*, std::vector<int>*)’: user.cpp:32:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graf[nd].size();i++) ^ user.cpp:20:5: warning: variable ‘mx1’ set but not used [-Wunused-but-set-variable] int mx1[2]; ^ user.cpp:23:5: warning: unused variable ‘ct’ [-Wunused-variable] int ct=1; ^ user.cpp: In function ‘int main()’: user.cpp:70:5: warning: unused variable ‘a1’ [-Wunused-variable] int a1=a; ^