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Java-based LeetCode algorithm problem solutions, regularly updated
1208\. Get Equal Substrings Within Budget
Medium
You are given two strings `s` and `t` of the same length and an integer `maxCost`.
You want to change `s` to `t`. Changing the ith
character of `s` to ith
character of `t` costs `|s[i] - t[i]|` (i.e., the absolute difference between the ASCII values of the characters).
Return _the maximum length of a substring of_ `s` _that can be changed to be the same as the corresponding substring of_ `t` _with a cost less than or equal to_ `maxCost`. If there is no substring from `s` that can be changed to its corresponding substring from `t`, return `0`.
**Example 1:**
**Input:** s = "abcd", t = "bcdf", maxCost = 3
**Output:** 3
**Explanation:** "abc" of s can change to "bcd". That costs 3, so the maximum length is 3.
**Example 2:**
**Input:** s = "abcd", t = "cdef", maxCost = 3
**Output:** 1
**Explanation:** Each character in s costs 2 to change to character in t, so the maximum length is 1.
**Example 3:**
**Input:** s = "abcd", t = "acde", maxCost = 0
**Output:** 1
**Explanation:** You cannot make any change, so the maximum length is 1.
**Constraints:**
* 1 <= s.length <= 105
* `t.length == s.length`
* 0 <= maxCost <= 106
* `s` and `t` consist of only lowercase English letters.