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g0401_0500.s0483_smallest_good_base.readme.md Maven / Gradle / Ivy

483\. Smallest Good Base

Hard

Given an integer `n` represented as a string, return _the smallest **good base** of_ `n`.

We call `k >= 2` a **good base** of `n`, if all digits of `n` base `k` are `1`'s.

**Example 1:**

**Input:** n = "13"

**Output:** "3"

**Explanation:** 13 base 3 is 111.

**Example 2:**

**Input:** n = "4681"

**Output:** "8"

**Explanation:** 4681 base 8 is 11111.

**Example 3:**

**Input:** n = "1000000000000000000"

**Output:** "999999999999999999"

**Explanation:** 1000000000000000000 base 999999999999999999 is 11.

**Constraints:**

*   `n` is an integer in the range [3, 1018].
*   `n` does not contain any leading zeros.