1100. Find K-Length Substrings With No Repeated Characters

https://leetcode.com/problems/find-k-length-substrings-with-no-repeated-characters

Description

Given a string s and an integer k, return the number of substrings in s of length k with no repeated characters.

Example 1:

**Input:** s = "havefunonleetcode", k = 5
**Output:** 6
**Explanation:** There are 6 substrings they are: 'havef','avefu','vefun','efuno','etcod','tcode'.

Example 2:

**Input:** s = "home", k = 5
**Output:** 0
**Explanation:** Notice k can be larger than the length of s. In this case, it is not possible to find any substring.

Constraints:

• 1 <= s.length <= 104

• s consists of lowercase English letters.

• 1 <= k <= 104

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