Compilare: user.cpp: In function ‘void update(int, int)’: user.cpp:6:30: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] #define zero(x) (x ^ (x - 1) & x) ^ user.cpp:18:16: note: in expansion of macro ‘zero’ ind += zero(ind); ^ user.cpp: In function ‘int query(int)’: user.cpp:6:30: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] #define zero(x) (x ^ (x - 1) & x) ^ user.cpp:27:16: note: in expansion of macro ‘zero’ ind -= zero(ind); ^ user.cpp: In function ‘int search(int)’: user.cpp:49:1: warning: control reaches end of non-void function [-Wreturn-type] } ^