1554. Strings Differ by One Character

https://leetcode.com/problems/strings-differ-by-one-character

Description

Given a list of strings dict where all the strings are of the same length.

Return True if there are 2 strings that only differ by 1 character in the same index, otherwise return False.

**Follow up:**Could you solve this problem in O(n*m) where n is the length of dict and m is the length of each string.

Example 1:

**Input:** dict = ["abcd","acbd", "aacd"]
**Output:** true
**Explanation:** Strings "a**b**cd" and "a**a**cd" differ only by one character in the index 1.

Example 2:

**Input:** dict = ["ab","cd","yz"]
**Output:** false

Example 3:

**Input:** dict = ["abcd","cccc","abyd","abab"]
**Output:** true

Constraints:

• Number of characters in dict <= 10^5

• dict[i].length == dict[j].length

• dict[i] should be unique.

• dict[i] contains only lowercase English letters.

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