text: #!/usr/bin/env python3
  
  from itertools import combinations
  
  import helper
  
  config = {
      'example': {
          'fname': 'example.txt',
          'WINDOW': 5
      },
      'input': {
          'fname': 'input.txt',
          'WINDOW': 25
      }
  }
  
  
  def check(summa, numbers):
      for a, b in combinations(numbers, 2):
          if (a + b == summa) and (a != b):
              return True
          #
      #
      return False
  
  
  def get_result(fname, window):
      lines = helper.read_lines_as_ints(fname)
      for i in range(window, len(lines)):
          curr = lines[i]
          prev_window = lines[(i-window):i]
          # print(curr, prev_window)
          if not check(curr, prev_window):
              return curr
  
  
  def main():
      # settings = 'example'
      settings = 'input'
  
      fname = config[settings]['fname']
      window = config[settings]['WINDOW']
  
      result = get_result(fname, window)
      print(result)
  
  ##############################################################################
  
  if __name__ == "__main__":
      main()
  