output_description: Print the cube of x in a line.
input_description: An integer x is given in a line.
attempt: import sys
  
  numbers = []
  max = 0
  for line in sys.stdin:
      numbers.append(int(line))
  
  for i in range(0, len(numbers)):
      for j in range(i, len(numbers)):
          if numbers[j] - numbers[i] > max:
              max = numbers[j] - numbers[i]
  print(max)
  
problem_description: X Cubic
  
  Write a program which calculates the cube of a given integer x.
samples: [{"input": "2", "output": "8"}, {"input": "3", "output": "27"}]