#316

Remove Duplicate Letters

specialist · 825 · lc medium +31 · verified · 52.9% accepted · 9,278 likes · top 43%

Description

Given a string s, remove duplicate characters so that each character appears exactly once. Among all valid results, return the lexicographically smallest one.

Example 1:

Input: s = "bcabc"

Output: "abc"

Example 2:

Input: s = "cbacdcbc"

Output: "acdb"

Code

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class Solution:
    def removeDuplicateLetters(self, s: str) -> str:

class Solution:
    def removeDuplicateLetters(self, s: str) -> str: