Problem · Hash Table

Most-Frequent Next-Word Predictor

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Problem statement

Train a next-word predictor from one ordered array of case-sensitive tokens. Every adjacent pair contributes one observation from its first token to its second.

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Examples

Example 1

trainingTokens = ["i","like","tea","i","like","coffee","i","like","tea"]queries = ["i","like"]return = ["like","tea"]

The word after i is always like, while tea follows like twice and coffee once.

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CodePython 3
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FastPrep Pro
Reported in 1 Google interview this week

Unlock this recently reported problem

FastPrep Pro gives you full access to interview problems reported within the last week.

  • Full problem statement and constraints
  • 1 more worked example, explained
  • Guided hints and editorial
  • Run your code on real test cases
$8.25/month

$99 billed yearly — or $19 month-to-month. Cancel anytime.

Free plan — 2 of 2 free unlocks used this week