Compilare: user.cpp: In function ‘void update(int, int)’: user.cpp:4:21: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] #define zeros(x) (x & (x - 1) ^ x ) ^ user.cpp:14:28: note: in expansion of macro ‘zeros’ for (; x < LMax ; x += zeros(x)) ^ user.cpp: In function ‘int query(int)’: user.cpp:4:21: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] #define zeros(x) (x & (x - 1) ^ x ) ^ user.cpp:20:24: note: in expansion of macro ‘zeros’ for (; x > 0; x -= zeros(x)) ^ user.cpp: In function ‘int main()’: user.cpp:27:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("twoton.in", "r", stdin); ^ user.cpp:28:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("twoton.out", "w", stdout); ^ user.cpp:30:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:33:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &A[i]); ^