Leetcode Problem 1733. Minimum Number of People to Teach

1733. Minimum Number of People to Teach

Leetcode Solutions

Find Common Language or Teach the Most Popular One

  1. Convert each user's language list to a set for faster intersection operations.
  2. Create a set to keep track of users who need to be taught a new language.
  3. Iterate over each friendship pair and check if there is a common language. If not, add both users to the set.
  4. If the set is empty, no teaching is needed, return 0.
  5. Count the occurrence of each language among users who need to be taught.
  6. Find the language with the maximum count.
  7. The minimum number of users to teach is the size of the set minus the maximum count.
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Teach Each User the Missing Languages

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