Compilare: user.cpp: In function ‘int bfs()’: user.cpp:34:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘int checkFlow(int, int)’: user.cpp:71:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:78:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[d].size();i++) ^