# Substrings of Size Three with Distinct Characters solution leetcode

## Substrings of Size Three with Distinct Characters solution leetcode

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.

substring is a contiguous sequence of characters in a string.

Substrings of Size Three with Distinct Characters solution leetcode

Example 1: Substrings of Size Three with Distinct Characters solution leetcode

```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: Substrings of Size Three with Distinct Characters solution leetcode

```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".
```

Substrings of Size Three with Distinct Characters solution leetcode

Constraints: Substrings of Size Three with Distinct Characters solution leetcode

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

# SOLUTION

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• Minimize Maximum Pair Sum in Array4
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