3536. Maximum Product of Two Digits¶

You are given a positive integer n.

Return the maximum product of any two digits in n.

Note: You may use the same digit twice if it appears more than once in n.

Example 1¶

Input: n = 31
Output: 3
Explanation:
- The digits of n are [3, 1].
- The possible products of any two digits are: 3 * 1 = 3.
- The maximum product is 3.

Example 2¶

Input: n = 22
Output: 4
Explanation:
- The digits of n are [2, 2].
- The possible products of any two digits are: 2 * 2 = 4.
- The maximum product is 4.

Example 3¶

Input: n = 124
Output: 8
Explanation:
- The digits of n are [1, 2, 4].
- The possible products of any two digits are: 1 * 2 = 2, 1 * 4 = 4, 2 * 4 = 8.
- The maximum product is 8.

Constraints¶

10 <= n <= 10^9