Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:23:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < A[nod].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:32:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:40:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &x, &y); ^