0984. String Without AAA or BBB

https://leetcode.com/problems/string-without-aaa-or-bbb

Description

Given two integers a and b, return any string s such that:

• s has length a + b and contains exactly a 'a' letters, and exactly b 'b' letters,

• The substring 'aaa' does not occur in s, and

• The substring 'bbb' does not occur in s.

Example 1:

**Input:** a = 1, b = 2
**Output:** "abb"
**Explanation:** "abb", "bab" and "bba" are all correct answers.

Example 2:

**Input:** a = 4, b = 1
**Output:** "aabaa"

Constraints:

• 0 <= a, b <= 100

• It is guaranteed such an s exists for the given a and b.

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