Leetcode Problem 1583. Count Unhappy Friends

1583. Count Unhappy Friends

Leetcode Solutions

Using Preference Maps and Pairing Information

  1. Create a map to store the index of each friend in every person's preference list for quick access.
  2. Create a map to store the current pair of each person.
  3. Iterate through each person and check their preferences in order.
  4. For each preferred friend, check if the preferred friend would also prefer the current person over their own pair.
  5. If both conditions are met, increment the count of unhappy friends.
  6. Return the count of unhappy friends.
UML Thumbnail

Brute Force Checking of Unhappiness

Ask Question

Programming Language
image/screenshot of info(optional)
Full Screen
Loading...

Suggested Answer

Answer
Full Screen
Copy Answer Code
Loading...