Решение задачи File 13

def EmptyFile(fname):
    open(fname, 'w').close()
    
def Write2File(fname,line):
    try:
        f = open(fname, "a")
        try:
            f.write(line)
        finally:
            f.close()
    except IOError:
        print('Write error: ',fname)

f_source = "file13_source.txt"
f_positive = "file13_p.txt"
f_negative = "file13_n.txt"
EmptyFile(f_positive)
EmptyFile(f_negative)

try:
    with open(f_source,'r') as f:
        lines = f.readlines()
        #print(lines)
        for line in reversed(lines):
            k = int(line.strip())
            if k > 0:
                Write2File(f_positive,str(k)+'\n')
            elif k < 0:
                Write2File(f_negative,str(k)+'\n')
except IOError:
    print('Open error: ',f_source)
									

program File13;
var
 S:String;
 F_in,F_out1,F_out2: File of Integer;
 i,temp,len:integer;
begin
  Write('File: ');
  Readln(S);
  Assign(F_in,S);
  Reset(F_in);
  Write('File_out 1: ');
  Readln(S);
  Assign(F_out1,S);
  ReWrite(F_out1);
  Write('File_out 2: ');
  Readln(S);
  Assign(F_out2,S);
  ReWrite(F_out2);
  len:=1;
  while (not eof(F_in)) do
   begin
    Read(F_in,temp);
    inc(len);
   end;
  while (len>0) do
   begin
    Close(F_in);
    Reset(F_in);
    i:=1;
    while (not eof(F_in)) and (i<>len) do
     begin
      Read(F_in,temp);
      inc(i);
     end;
    if temp>0 then Write(F_out1,temp);
    if temp<0 then Write(F_out2,temp);
    dec(len);
   end;
  Close(F_in);
  Close(F_out1);
  Close(F_out2);
end.