Compilare: user.cpp: In function ‘void update(int, int)’: user.cpp:12:31: 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:20:28: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] for (; x; x -= x ^ (x - 1)&x) ^ user.cpp: In function ‘int main()’: user.cpp:63:17: warning: ignoring return value of ‘int system(const char*)’, declared with attribute warn_unused_result [-Wunused-result] system("pause"); ^