G471000 G471000

Algorithm/String

• First Unique Character in a String

  Algorithm/String 2021. 11. 22. 22:40

  Given a string s, find the first non-repeating character in it and return its index. If it does not exist, return -1. Example 1: Input: s = "leetcode" Output: 0 Example 2: Input: s = "loveleetcode" Output: 2 Example 3: Input: s = "aabb" Output: -1 Constraints: 1

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