program zad_d;

{$APPTYPE CONSOLE}

uses
  SysUtils;

const
  N = 100005;

var
  a, k: array [1..N] of integer;//Hi baby bon
  s, x: string;
  cnt, i, c: integer;

function stack(s: integer): integer;
begin
  inc(cnt);
  a[cnt] := s;
end;

begin
  readln(s);
  c := 0;
  cnt := 0;
  for i := 1 to length(s) do begin
    if (ord(s[i]) in [48..57]) then
      stack(StrToInt(s[i]));
    if (s[i] = '+') then begin
      inc(c);
      k[c] := a[cnt - 1] + a[cnt];
      cnt := cnt - 2;
      stack(k[c]);
    end
    else
      if (s[i] = '*') then begin
        inc(c);
        k[c] := a[cnt - 1] * a[cnt];
        cnt := cnt - 2;
        stack(k[c]);
      end
    else
      if (s[i] = '-') then begin
        inc(c);
        k[c] := a[cnt - 1] - a[cnt];
        cnt := cnt - 2;
        stack(k[c]);
      end;
  end;
  for i := 1 to cnt do begin
    write(a[i], ' ');
  end;
  readln;
  readln;
end.