You are given a string and 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: • 1 <=s.length <- 105 • s consists of only uppercase English letters. • 0 <= k <= s.length

You are given a string and 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: • 1 <=s.length <- 105 • s consists of only uppercase English letters. • 0 <= k <= s.length

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

You are given a strings 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 =
Output: 4
"AABABBA", k = 1
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:
1 <=s.length <= 105
s consists of only uppercase English letters.
• 0 <= k <= s.length

Given a strings and an integer k, return the length of the
longest substring of s such that the frequency of each characte
in this substring is greater than or equal to k.
Example 1:
Input: s= "aaabb", k = 3
Output: 3
Explanation: The longest substring is "aaa", as
'a' is repeated 3 times.
Example 2:
Input: s="ababbc", k = 2
Output: 5
Explanation: The longest substring is "ababb", as
'a' is repeated 2 times and 'b' is repeated 3
times.
Constraints:
• 1 <=s.length <= 104
s consists of only lowercase English letters.
1 <= k <= 105

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