program a;

var
  b: integer;

function fac(c: integer): integer;

begin
  if (c = 0) then 
    fac := 1 
  else
    fac := fac(c-1) * c
end;

function plus(d,e: integer): integer;

begin
  fac := d+e
end;

begin
  b := 3
end.