Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:27:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < A[nd].size() && !stop; i++) { ^ user.cpp: In function ‘int main()’: user.cpp:71:61: warning: suggest parentheses around assignment used as truth value [-Wparentheses] for (int i = 1; i <= n; i++) A[i].shrink_to_fit(), viz[i] = orientare[i] = 0; ^ user.cpp:63:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("comoditate.in", "r", stdin); ^ user.cpp:64:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("comoditate.out", "w", stdout); ^ user.cpp:65:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &t); ^ user.cpp:68:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &n, &m); ^ user.cpp:74:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &x, &y); ^