Compilare: user.cpp: In function ‘void dalek(int, int, int)’: user.cpp:11:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define lim(a) e[a].size() ^ user.cpp:15:25: note: in expansion of macro ‘lim’ for (int i = 0; i < lim(y); i++) ^ user.cpp: In function ‘int main()’: user.cpp:61:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < impar.size(); i++) ^