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g0001_0100.s0043_multiply_strings.readme.md Maven / Gradle / Ivy

43\. Multiply Strings

Medium

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

**Note:** You must not use any built-in BigInteger library or convert the inputs to integer directly.

**Example 1:**

**Input:** num1 = "2", num2 = "3"

**Output:** "6"

**Example 2:**

**Input:** num1 = "123", num2 = "456"

**Output:** "56088"

**Constraints:**

*   `1 <= num1.length, num2.length <= 200`
*   `num1` and `num2` consist of digits only.
*   Both `num1` and `num2` do not contain any leading zero, except the number `0` itself.