[Swift]LeetCode1163. 按字典序排在最后的子串 | Last Substring in Lexicographical Order

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Example 1:

Input: "abab"
Output: "bab" Explanation: The substrings are ["a","ab","aba","abab","b","ba","bab"]. The lexicographically maximum substring is "bab". 

Example 2:

Input: "leetcode"
Output: "tcode"

Note:

  1. 1 <= s.length <= 10^5
  2. s contains only lowercase English letters.
  3. @H_404_42@

    给你一个字符串 s,找出它的所有子串并按字典序排列,返回排在最后的那个子串。

    示例 1:

    输入:"abab"
    输出:"bab"
    解释:我们可以找出 7 个子串 ["a","bab"]。按字典序排在最后的子串是 "bab"。
    

    示例 2:

    输入:"leetcode"
    输出:"tcode"

    提示

    1. 1 <= s.length <= 10^5
    2. s 仅含有小写英文字符。
    3. @H_404_42@

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