Solution (leetcode-in-java 1.23 API)

java.lang.Object
- g0301_0400.s0316_remove_duplicate_letters.Solution

```
public class Solution
extends Object
```
316 - Remove Duplicate Letters.
Medium

Given a string s, 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: s = “bcabc”

Output: “abc”

Example 2:

Input: s = “cbacdcbc”

Output: “acdb”

Constraints:
- 1 <= s.length <= 10⁴
- s consists of lowercase English letters.
Note: This question is the same as 1081.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  Solution()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  String removeDuplicateLetters(String s)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- Solution
```
public Solution()
```

Method Detail

removeDuplicateLetters

public String removeDuplicateLetters(String s)