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g0801_0900.s0890_find_and_replace_pattern.readme.md Maven / Gradle / Ivy

890\. Find and Replace Pattern

Medium

Given a list of strings `words` and a string `pattern`, return _a list of_ `words[i]` _that match_ `pattern`. You may return the answer in **any order**.

A word matches the pattern if there exists a permutation of letters `p` so that after replacing every letter `x` in the pattern with `p(x)`, we get the desired word.

Recall that a permutation of letters is a bijection from letters to letters: every letter maps to another letter, and no two letters map to the same letter.

**Example 1:**

**Input:** words = ["abc","deq","mee","aqq","dkd","ccc"], pattern = "abb"

**Output:** ["mee","aqq"]

**Explanation:** "mee" matches the pattern because there is a permutation {a -> m, b -> e, ...}. "ccc" does not match the pattern because {a -> c, b -> c, ...} is not a permutation, since a and b map to the same letter.

**Example 2:**

**Input:** words = ["a","b","c"], pattern = "a"

**Output:** ["a","b","c"]

**Constraints:**

*   `1 <= pattern.length <= 20`
*   `1 <= words.length <= 50`
*   `words[i].length == pattern.length`
*   `pattern` and `words[i]` are lowercase English letters.