Find All Anagrams in a String

MediumStringsSliding Window

Solve this the way you would in the interview: out loud, on a timer, with an AI interviewer asking follow-ups while you code. You get a scored report at the end.

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Problem

Given two strings s and p, return an array of all the start indices of p's anagrams in s. You may return the answer in any order. An anagram is a word or phrase formed by rearranging the letters of a different word or phrase, using all the original letters exactly once.

Examples

Input: s = "cbaebabacd", p = "abc"
Output: [0,6]
Substring "cba" starts at index 0. Substring "bac" starts at index 6.
Input: s = "abab", p = "ab"
Output: [0,1,2]

Constraints

  • 1 <= s.length, p.length <= 3 * 10^4
  • s and p consist of lowercase English letters.

What the interviewer grades

A correct solution is one of five scores. The report also grades problem understanding (did you clarify inputs and edge cases before coding), problem solving, communication while you work, code quality, and testing. See a sample report, or read up on the pattern in the lessons.

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