[!WARNING|style:flat] This question is temporarily unanswered if you have good ideas. Welcome to Create Pull Request PR
Example 1:
Input: a = "11", b = "1"
Output: "100"
...
... Excel Sheet Column Title
如果你同我一样热爱数据结构、算法、LeetCode，可以关注我 GitHub 上的 LeetCode 题解：awesome-golang-algorithm