ㅊ++1 387. First Unique Character in a String 문제풀이 387. First Unique Character in a String Easy 5340207Add to ListShare Given a string s, find the first non-repeating character in it and return its index. If it does not exist, return -1. 단 한번만 쓰여진 문자형을 찾아 그 index를 retrun 하면 된다. Example 1: Input: s = "leetcode" Output: 0 Example 2: Input: s = "loveleetcode" Output: 2 Example 3: Input: s = "aabb" Output: -1 Constraints: 1 2022. 7. 19. 이전 1 다음