Package g0401_0500.s0424_longest_repeating_character_replacement

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    424 - Longest Repeating Character Replacement.

    Medium

    You are given a string s and an integer k. You can choose any character of the string and change it to any other uppercase English character. You can perform this operation at most k times.

    Return the length of the longest substring containing the same letter you can get after performing the above operations.

    Example 1:

    Input: s = "ABAB", k = 2

    Output: 4

    Explanation: Replace the two 'A's with two 'B's or vice versa.

    Example 2:

    Input: s = "AABABBA", k = 1

    Output: 4

    Explanation: Replace the one 'A' in the middle with 'B' and form "AABBBBA". The substring "BBBB" has the longest repeating letters, which is 4.

    Constraints:

    • <code>1 <= s.length <= 10<sup>5</sup></code>

    • s consists of only uppercase English letters.

    • 0 &lt;= k &lt;= s.length

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Integer characterReplacement(String s, Integer k)

      • Methods inherited from class java.lang.Object

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