Package g0401_0500.s0482_license_key_formatting

Class Solution

java.lang.Object
g0401_0500.s0482_license_key_formatting.Solution
public class Solution extends Object
482 - License Key Formatting.<p>Easy</p> <p>You are given a license key represented as a string <code>s</code> that consists of only alphanumeric characters and dashes. The string is separated into <code>n + 1</code> groups by <code>n</code> dashes. You are also given an integer <code>k</code>.</p> <p>We want to reformat the string <code>s</code> such that each group contains exactly <code>k</code> characters, except for the first group, which could be shorter than <code>k</code> 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.</p> <p>Return <em>the reformatted license key</em>.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> s = &ldquo;5F3Z-2e-9-w&rdquo;, k = 4</p> <p><strong>Output:</strong> &ldquo;5F3Z-2E9W&rdquo;</p> <p><strong>Explanation:</strong> 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.</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> s = &ldquo;2-5g-3-J&rdquo;, k = 2</p> <p><strong>Output:</strong> &ldquo;2-5G-3J&rdquo;</p> <p><strong>Explanation:</strong> 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.</p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= s.length <= 10<sup>5</sup></code></li> <li><code>s</code> consists of English letters, digits, and dashes <code>'-'</code>.</li> <li><code>1 <= k <= 10<sup>4</sup></code></li> </ul>

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • licenseKeyFormatting

      public String licenseKeyFormatting(String s, int k)