17. Generate Parentheses
Given n pairs of parentheses, generate all combinations of well-formed parentheses.
範例 1:
輸入： n = 3 輸出： ["((()))","(()())","(())()","()(())","()()()"]
範例 2:
輸入： n = 1 輸出： ["()"]
限制條件：
1 <= n <= 8
● 已自動儲存第 1 行，第 1 欄
Given n pairs of parentheses, generate all combinations of well-formed parentheses.
輸入： n = 3 輸出： ["((()))","(()())","(())()","()(())","()()()"]
輸入： n = 1 輸出： ["()"]
1 <= n <= 8