ShirokovP

Verified answer

// PascalABC.NET 3.2, сборка 1439 от 09.05.2017

var
  N: integer;

function tri(n: integer): longint;
begin
  case n of
    0,1: tri := 0;
    2: tri := 1
  else
    tri := tri(n - 3) + tri(n - 2)+tri(n-1);
  end;
end;

var
  a: array of integer;
  i: longint;

begin
  readln(N);
  setlength(a, N);
  for i := 0 to N-1 do
    Write(tri(i) + ' ');
  for i := 0 to N-1 do
    a[i] := tri(i);
  writeln('');
  for i := 0 to N-1 do
    if a[i] mod 3 = 0 then
      write(a[i] + ' ');
end.