Compilare: user.cpp: In function ‘int main()’: user.cpp:27:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (inDeg[i] > G[i].size()) ^ user.cpp:17:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:21:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^