Compilare: user.cpp: In function ‘void upd(int, int)’: user.cpp:12:26: 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:20:23: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] for(;x;x-=x^(x-1) & x) ^ user.cpp: In function ‘int main()’: user.cpp:27:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%i",&n); ^ user.cpp:31:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%i",&v[i]); ^