Compilare: user.cpp: In function ‘int Bfs(int, int, int*)’: user.cpp:55:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:98:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sol.size();i++) ^ user.cpp:78:9: warning: unused variable ‘ok’ [-Wunused-variable] int ok=0; ^