Substrings of Size Three with Distinct Characters - Video Solutions

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Substrings of Size Three with Distinct Characters - Video Solution

Watch 10 video solutions for Substrings of Size Three with Distinct Characters, a easy level problem involving Hash Table, String, Sliding Window. This walkthrough by NeetCode has 657,697 views views. Want to try solving it yourself? Practice on FleetCode or read the detailed text solution.

Problem Statement

A string is good if there are no repeated characters.

Given a string s, return the number of good substrings of length three in s.

Note that if there are multiple occurrences of the same substring, every occurrence should be counted.

A substring is a contiguous sequence of characters in a string.

Example 1:

Input: s = "xyzzaz"
Output: 1
Explanation: There are 4 substrings of size 3: "xyz", "yzz", "zza", and "zaz". 
The only good substring of length 3 is "xyz".

Example 2:

Input: s = "aababcabc"
Output: 4
Explanation: There are 7 substrings of size 3: "aab", "aba", "bab", "abc", "bca", "cab", and "abc".
The good substrings are "abc", "bca", "cab", and "abc".

Constraints:

1 <= s.length <= 100
s consists of lowercase English letters.

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Problem Statement

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