Compilare: user.cpp: In function ‘void update(int, int)’: user.cpp:15:33: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] for (; x <= N; x += x^(x-1) & x) ^ user.cpp: In function ‘int query(int)’: user.cpp:24:28: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] for (; x; x -= x^(x-1) & x) ^ user.cpp: In function ‘int main()’: user.cpp:64:12: warning: unused variable ‘h’ [-Wunused-variable] int i, h = 1, t; ^