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leetcode/0387.First-Unique-Character-in-a-String/README.md
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# [387. First Unique Character in a String](https://leetcode.com/problems/first-unique-character-in-a-string/)
## 题目:
## 题目
Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1.