program bing;
var
 f1,f2:text;
 n,i:integer;
 a:array[0..100] of integer;
procedure init;
begin
 assign(f1,'hanoi.in');reset(f1);
 assign(f2,'hanoi.out');rewrite(F2);
 read(f1,n);
end;
procedure nb(y:integer);
var i,k:integer;

begin
 fillchar(a,sizeof(a),0);
 a[1]:=1;a[0]:=1;
 for k:=1 to y do
 begin
  for i:=1 to a[0] do
  a[i]:=a[i]*2;
  for i:=1 to a[0] do
  if a[i]>=10 then
   begin
    a[i+1]:=a[i+1]+(a[i] div 10);
    a[i]:=a[i] mod 10;
    if a[a[0]+1]>0 then a[0]:=a[0]+1;
   end;
 end;
 if a[1]>0 then a[1]:=a[1]-1;
 for i:=1 to a[0] do
 a[i]:=a[i]*2;
 for i:=1 to a[0] do
 if a[i]>=10 then
  begin
   a[i+1]:=a[i+1]+(a[i] div 10);
   a[i]:=a[i] mod 10;
   if a[a[0]+1]>0 then a[0]:=a[0]+1;
  end;
end;
begin
 init;
 nb(n);
 for i:=a[0] downto 1 do  write(f2,a[i]);
 close(f1);close(f2);
end.