Compilare: user.cpp: In function ‘int FILL(int, int)’: user.cpp:45:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:172:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i<V.size(); i++) ^