text: input = []
  with open("input.txt", "r") as f:
      for line in f:
          num = int(line.strip("\n"))
          input.append(num)
  
  input.sort()
  
  for i in range(len(input)):
      j = i + 1
      k = len(input) - j - 1
      while j < k:
          if input[j] + input[k] == 2020 - input[i]:
              print(input[i] * input[j] * input[k])
              exit(0)
          elif input[j] + input[k] < 2020 - input[i]:
              j = j + 1
          else:
              k = k - 1
  
  print("no result")
  