Compilare: user.cpp: In function ‘void adauga(int, int)’: user.cpp:6:34: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] for ( ; l<=(n<<1); l+=l^(l-1)&l) ^ user.cpp: In function ‘int query(int)’: user.cpp:12:29: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] for ( ; l>=1; l-=l^(l-1)&l) ^ user.cpp: In function ‘int main()’: user.cpp:30:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("order.in","r",stdin); ^ user.cpp:31:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("order.out","w",stdout); ^ user.cpp:33:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^