Compilare: user.cpp: In member function ‘mat aint::query(uint32_t, uint32_t)’: user.cpp:50:18: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(st&1 == 1){ ^ user.cpp:52:18: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(dr&1 == 1){ ^ user.cpp: In function ‘int main()’: user.cpp:77:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < k; ++i){ ^