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# 1208. Get Equal Substrings Within Budget

<https://leetcode.com/problems/get-equal-substrings-within-budget>

## Description

You are given two strings `s` and `t` of the same length. You want to change `s` to `t`. Changing the `i`-th character of `s` to `i`-th character of `t` costs `|s[i] - t[i]|` that is, the absolute difference between the ASCII values of the characters.

You are also given an integer `maxCost`.

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 charactor in t, so the maximum length is 1.
```

**Example 3:**

```
**Input:** s = "abcd", t = "acde", maxCost = 0
**Output:** 1
**Explanation:** You can't make any change, so the maximum length is 1.
```

**Constraints:**

* `1 <= s.length, t.length <= 10^5`
* `0 <= maxCost <= 10^6`
* `s` and `t` only contain lower case English letters.

## ac

```java
```