Compilare: user.cpp: In function ‘void Update(int, int, int)’: user.cpp:43:11: warning: statement has no effect [-Wunused-value] for (x; x <= n; x += (x & -x)) ^ user.cpp: In function ‘long long int Query(int)’: user.cpp:49:11: warning: statement has no effect [-Wunused-value] for (x; x > 0; x -= (x & -x)) ^ user.cpp: In function ‘char Advance()’: user.cpp:21:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, SIZE, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:55:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("baruri.in", "r", stdin); ^ user.cpp:56:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("baruri.out", "w", stdout); ^