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  procedure QuickSort(var A: array of Integer; iLo, iHi: Integer);
  var
    Lo, Hi, Mid, T: Integer;
  begin
    Lo := iLo;
    Hi := iHi;
    Mid := A[(Lo + Hi) div 2];
    repeat
      while A[Lo] < Mid do Inc(Lo);
      while A[Hi] > Mid do Dec(Hi);
      if Lo <= Hi then
      begin
        VisualSwap(A[Lo], A[Hi], Lo, Hi);
        T := A[Lo];
        A[Lo] := A[Hi];
        A[Hi] := T;
        Inc(Lo);
        Dec(Hi);
      end;
    until Lo > Hi;
    if Hi > iLo then QuickSort(A, iLo, Hi);
    if Lo < iHi then QuickSort(A, Lo, iHi);
    if Terminated then Exit;
  end;


  procedure QuickSort(var A: array of Integer; iLo, iHi: Integer);
  var
    Lo, Hi, Mid, T: Integer;
  begin
    Lo := iLo;
    Hi := iHi;
    Mid := A[(Lo + Hi) div 2];


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