Compilare: user.cpp: In function ‘void Update(int, Element)’: user.cpp:60:11: warning: statement has no effect [-Wunused-value] for (x; x <= MAXVAL; x += (x & -x)) ^ user.cpp: In function ‘Element Query(int)’: user.cpp:66:11: warning: statement has no effect [-Wunused-value] for (x; x > 0; x -= (x & -x)) ^ user.cpp: In function ‘char Advance()’: user.cpp:23:38: 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:72:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rayman.in", "r", stdin); ^ user.cpp:73:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rayman.out", "w", stdout); ^