Compilare: user.cpp: In function ‘int main()’: user.cpp:58:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < ans.size();i++) ^ user.cpp:13:9: warning: variable ‘n’ set but not used [-Wunused-but-set-variable] int n, m, i, nr, nod, e, to, x, y; ^