力扣721. 账户合并
目录
力扣721. Accounts Merge（账户合并）
合并相同用户的账户。
示例 1：
输入：accounts = [["John","johnsmith@mail.com","john00@mail.com"],["John","johnnybravo@mail.com"],["John","johnsmith@mail.com","john_newyork@mail.com"],["Mary","mary@mail.com"]]
输出：[["John","john00@mail.com","john_newyork@mail.com","johnsmith@mail.com"],["John","johnnybravo@mail.com"],["Mary","mary@mail.com"]]
解释：...提示：
- 1 <= accounts.length <= 1000
- 2 <= accounts[i].length <= 10
- 1 <= accounts[i][j].length <= 30