Compilare: user.cpp: In function ‘bool cuplaj(int)’: user.cpp:22:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v1[nod].size (); ++i) ^ user.cpp:34:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v1[nod].size (); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:51:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("revolutie.in", "r", stdin); ^ user.cpp:52:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("revolutie.out", "w", stdout); ^ user.cpp:55:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &n); ^ user.cpp:60:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &x); ^