Compilare: user.cpp: In function ‘int main()’: user.cpp:40:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0; h< adj[q[i]].size(); h++) ^ user.cpp:14:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:17:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^