每日打卡：一题搞定整数积与和的差值

前端

2023-10-19 11:57:36

LeetCode1281题整数的各位积和之差 | 刷题打卡

题目

给你一个整数n，请你帮忙计算并返回该整数「各位数字之积」与「各位数字之和」的差。

解决方案：

为了求解整数的各位积和之差，我们可以采用以下步骤：

将整数n转成字符串str。
循环遍历字符串str，对每个字符str[i]进行处理。
将每个字符str[i]转成数字num[i]，并更新product和sum，其中product是各位数字的积，sum是各位数字的和。
计算出积和差值diff，即product - sum。
返回diff。

这里提供一个示例代码，供你参考：

def subtract_product_and_sum(n):
  """
  Calculates the difference between the product and sum of the digits of an integer.

  Args:
    n: The integer to calculate the difference for.

  Returns:
    The difference between the product and sum of the digits of n.
  """

  # Convert n to a string.
  str_n = str(n)

  # Initialize the product and sum.
  product = 1
  sum = 0

  # Loop through the digits of n.
  for digit in str_n:
    # Convert the digit to an integer.
    int_digit = int(digit)

    # Update the product and sum.
    product *= int_digit
    sum += int_digit

  # Calculate the difference between the product and sum.
  diff = product - sum

  # Return the difference.
  return diff


# Test the function.
print(subtract_product_and_sum(234))  # Output: 15
print(subtract_product_and_sum(4421))  # Output: -6