Medium

Quiz

#22 Generate Parentheses

APPROACH

Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses.

Example 1:

Input: n = 3

Output: ["((()))","(()())","(())()","()(())","()()()"]

Example 2:

Input: n = 1

Output: ["()"]

1 of 4

What is the optimal approach for this problem?