Package g0401_0500.s0482_license_key_formatting

Class Solution

java.lang.Object
g0401_0500.s0482_license_key_formatting.Solution
public class Solution extends java.lang.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

    Modifier and Type
    Method
    Description
    java.lang.String
    licenseKeyFormatting(java.lang.String s, int k)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • licenseKeyFormatting

      public java.lang.String licenseKeyFormatting(java.lang.String s, int k)