program masuvu_1_11;

{$APPTYPE CONSOLE}

uses
  SysUtils;

var
  x,y,r:longint; f1,f2:text;
begin
  reset(f1,'1.txt');
  readln(f1,r);
  readln(f1,x);
  readln(f1,y);
  while x<>y do
  if x>y then
  x:=x div 2
  else
  y:=y div 2;
  rewrite(f2,'2.txt');
  writeln(f2,x);
  close(f1);
  close(f2);
  end.