Compilare: user.cpp: In function ‘int main()’: user.cpp:20:31: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] int m = 0, y = 1 << k - 1, x = 0, aux; ^ user.cpp:36:39: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] x = 0; y = 1 << k - 1; ^ user.cpp:20:43: warning: variable ‘aux’ set but not used [-Wunused-but-set-variable] int m = 0, y = 1 << k - 1, x = 0, aux; ^