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- function Rank(x: longint): byte;
- begin
- Result := 0;
- while x <> 0 do
- begin
- Result += 1;
- x := x div 10;
- end;
- end;
- label goback;
- var
- x: integer;
- begin
- goback:
- x := ReadLnInteger('Введите число:');
- if Rank(x) <> 4 then goto goback else WriteLn('Результат: ', x);
- end.
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