Compilare: user.cpp: In function ‘int query(int)’: user.cpp:72:66: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = pos + 1 - (idx - 1) * C; i < bucket[ idx ].size(); i++) ^ user.cpp: In function ‘char getChar()’: user.cpp:17:43: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] pos = 0, fread( buf, 1, BUF, fin ); ^