Solution (leetcode-in-java 1.23 API)

java.lang.Object
- g0401_0500.s0482_license_key_formatting.Solution

```
public class Solution
extends Object
```
482 - License Key Formatting.
Easy

You are given a license key represented as a string s that consists of only alphanumeric characters and dashes. The string is separated into n + 1 groups by n dashes. You are also given an integer k.

We want to reformat the string s such that each group contains exactly k characters, except for the first group, which could be shorter than k but still must contain at least one character. Furthermore, there must be a dash inserted between two groups, and you should convert all lowercase letters to uppercase.

Return the reformatted license key.

Example 1:

Input: s = “5F3Z-2e-9-w”, k = 4

Output: “5F3Z-2E9W”

Explanation: The string s has been split into two parts, each part has 4 characters. Note that the two extra dashes are not needed and can be removed.

Example 2:

Input: s = “2-5g-3-J”, k = 2

Output: “2-5G-3J”

Explanation: The string s has been split into three parts, each part has 2 characters except the first part as it could be shorter as mentioned above.

Constraints:
- 1 <= s.length <= 10⁵
- s consists of English letters, digits, and dashes '-'.
- 1 <= k <= 10⁴

- Constructor Summary
  
  Constructors
  Constructor Description
  
  Solution()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  String licenseKeyFormatting(String s, int k)
  - 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

licenseKeyFormatting

public String licenseKeyFormatting(String s,
                                   int k)