program Lab3_3;

{$APPTYPE CONSOLE}

uses
  SysUtils;

type
    TIntArray = array of Integer;
const
   MinNumber = 1;
   MaxNumber = 9999;

procedure CountingSort(var Arr : TIntArray; Num, Min, Max: Integer);
var
   Count: array of Integer;
   i, j, Index: Integer;
begin
   SetLength(Count, Max - Min);
   for i := 0 to (Max - Min - 1) do
      Count[i] := 0;
   for i := 0 to (Num - 1) do
      Count[Arr[i] - Min] := Count[Arr[i] - Min] + 1;
   Index := 0;
   for i := Min to Max do
      for j := 0 to (Count[i - Min] - 1) do
      begin
           Arr[Index] := i;
           Index := Index + 1;
      end;
end;

procedure OutputToFile(ArrayValue: TIntArray; var OutFile: TextFile; LenArr: Integer; MinElement,
MaxElement: Integer);
var
   OutFileName: string;
   i: Integer;
begin
   Write('Please, Enter the Name of Output File in Format name.txt: ');
   ReadLn(OutFileName);
   AssignFile(OutFile, OutFileName);
   ReWrite(OutFile);
   CountingSort(ArrayValue, LenArr, MinElement, MaxElement);
   WriteLn(OutFile, 'Sorted Array: ');
   for i := 0 to LenArr - 1 do
       WriteLn(OutFile, ArrayValue[i]);
   CloseFile(OutFile);
end;


function GetArrFromFile(ArrayValue: TIntArray; TheWay: string; var LenArr: Integer; var IsCorrect:
Boolean; var MinElement, MaxElement: Integer): TIntArray;
var
    ListInputFile: TextFile;
    i, j: Integer;
    Temp: string;
begin
    Assign(ListInputFile, TheWay);
    Reset(ListInputFile);
    j := 0;
    while (not Eof(ListInputFile)) do
    begin
       Readln(ListInputFile, Temp);
       Inc(j);
    end;
    LenArr := j;
    SetLength(ArrayValue, LenArr);
    Reset(ListInputFile);
    for i := 0 to LenArr - 1 do
       Read(ListInputFile, ArrayValue[i]);
    Reset(ListInputFile);
    MaxElement := ArrayValue[0];
    MinElement := MaxElement;
    for i := 0 to length(ArrayValue) - 1 do
       if ArrayValue[i] > MaxElement then
          MaxElement := ArrayValue[i]
       else
          if ArrayValue[i] < MinElement then
             MinElement := ArrayValue[i];
     CloseFile(ListInputFile);
     GetArrFromFile := ArrayValue;
end;

function IsValidElement(var UserFile: TextFile; ArrayValue: TIntArray; LenArr: Integer): Boolean;
var
   i: Integer;
   Error: String;
   IsValid: Boolean;
begin
   Reset(UserFile);
   IsValid := True;
   Error := ' ';
   SetLength (ArrayValue, LenArr);
   for i := 0 to LenArr - 1 do
   begin
         try
            Read(UserFile, ArrayValue[i]);
            if (ArrayValue[i] > MaxNumber) or (ArrayValue[i] < MinNumber) then
            begin
               Error := Error + '[' + IntToStr(i + 1) + '] ';
               IsValid := False;
            end;
         except
            Error := Error + '[' + IntToStr(i + 1) + '] ';
            IsValid := False;
         end;
      ReadLn(UserFile);
   end;
   if not IsValid then
   begin
      Write('Element Must Be In the Range from ', MinNumber, ' to ', MaxNumber, '.' + #13#10 +
         'Wrong Elements Are:');
      Writeln(Error);
   end;
   IsValidElement := IsValid;
   CloseFile(UserFile);
end;

function CheckInputFile(var UserFile: TextFile; var FileName: string): string;
var
   IsCorrect: Boolean;
begin
   IsCorrect := False;
   repeat
      try
         Write('Please, Enter the Name of File with Input Data in Format name.txt: ');
         ReadLn(FileName);
         AssignFile(UserFile, FileName);
         Reset(UserFile);
         if Eof(UserFile) then
            WriteLn('This File Is Empty. So That:');
         CheckInputFile := FileName;
         IsCorrect := True;
      except
         on E:EInOutError do
         begin
            IsCorrect := False;
            WriteLn('This File with Such Name Does Not Exist. Please, Try Again.');
         end;
      end;
   until IsCorrect;
   CloseFile(UserFile);
end;

procedure Main();
var
   UserFile: TextFile;
   OutFile: TextFile;
   FileName: string;
   LenArr: Integer;
   IsCorrect: Boolean;
   ArrayValue: TIntArray;
   MinElement, MaxElement: Integer;
begin
   IsCorrect := False;
   SetLength(ArrayValue, LenArr);
   repeat
      FileName := CheckInputFile(UserFile, FileName);
      ArrayValue := GetArrFromFile(ArrayValue, FileName, LenArr, IsCorrect, MinElement, MaxElement);
      IsCorrect := IsValidElement(UserFile, ArrayValue, LenArr);
   until IsCorrect;
   OutputToFile(ArrayValue, OutFile, LenArr, MinElement, MaxElement);
   ReadLn;
end;


begin
   Main();
end.