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af138b3 · Apr 3, 2020

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0043.multiply-strings

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Given two non-negative integers num1 and num2 represented as strings, return the product of num1 and num2, also represented as a string.

Example 1:

Input: num1 = "2", num2 = "3"
Output: "6"

Example 2:

Input: num1 = "123", num2 = "456"
Output: "56088"

Note:

  • The length of both num1 and num2 is < 110.
  • Both num1 and num2 contain only digits 0-9.
  • Both num1 and num2 do not contain any leading zero, except the number 0 itself.
  • You must not use any built-in BigInteger library or convert the inputs to integer directly.## 解题思路## 可能的變化