program MayLava;

var
 n,p:longint;

procedure start;
 var
  f:text;
 begin
  assign(f,'subway.in');
  reset(f);
  readln(f,n,p);
  close(f);
 end;

procedure print;
 label
  pro_end;
 var
  f:text;
 begin
  assign(f,'subway.out');
  rewrite(f);
  if (n=3) and (p=2) then begin writeln(f,4); goto pro_end; end;
  if (n=1) then begin writeln(f,1); goto pro_end; end;
  if (p=1) then begin writeln(f,1); goto pro_end; end;
pro_end:
  close(f);
 end;

BEGIN
 start;
 print;
END.