Compilare: user.cpp: In function ‘void update(int, int)’: user.cpp:62:28: 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:71:23: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] for(;x; x -= x^(x-1) & x) ^ user.cpp: In function ‘int main()’: user.cpp:118:8: warning: unused variable ‘diff’ [-Wunused-variable] float diff = ((float)t2-(float)t1); ^