Compilare: user.cpp: In function ‘int findH(int)’: user.cpp:19:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < H[r].size (); i++) { ^ user.cpp: In function ‘void deleteH(int)’: user.cpp:38:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = poz; i < H[r].size() - 1; i++) { ^ user.cpp: In function ‘int main()’: user.cpp:46:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("hashuri.in", "r", stdin); ^ user.cpp:47:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("hashuri.out", "w", stdout); ^ user.cpp:49:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &N); ^ user.cpp:52:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &tip, &X); ^