0316-remove-duplicate-letters.adoc

316. Remove Duplicate Letters

{leetcode}/problems/remove-duplicate-letters/[LeetCode - Remove Duplicate Letters^]

Given a string which contains only lowercase letters, remove duplicate letters so that every letter appears once and only once. You must make sure your result is the smallest in lexicographical order among all possible results.

Example 1:

Input: "bcabc"
Output: "abc"

Example 2:

Input: "cbacdcbc"
Output: "acdb"

思路分析

先遍历字符串，统计每个字符的出现次数。

一刷

link:{sourcedir}/_0316_RemoveDuplicateLetters.java[role=include]

参考资料

1. 316. 去除重复字母 - 官方题解

2. 316. 去除重复字母 - 一招吃遍力扣四道题