Compilare: user.cpp: In function ‘void Delete(int)’: user.cpp:13:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i != v[h].size(); ++i) ^ user.cpp: In function ‘bool Find(int)’: user.cpp:30:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i != v[h].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:50:38: 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:51:40: 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:55:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(scanf("%d", &T); T--;) ^ user.cpp:57:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &Q, &x); ^