Compilare: user.cpp: In member function ‘int flipClass::do_p()’: user.cpp:52:43: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] perm_v[m+i]=((perm & (1<<m+i))>>m+i); ^ user.cpp:52:50: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] perm_v[m+i]=((perm & (1<<m+i))>>m+i); ^ user.cpp: In function ‘int main()’: user.cpp:84:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(flip.do_p()<mp); ^