Leetcode Problem 526. Beautiful Arrangement

526. Beautiful Arrangement

Leetcode Solutions

Approach # Backtracking

  1. Initialize a visited array to keep track of which numbers have been used.
  2. Define a calculate function that takes the current position and the count of valid arrangements.
  3. If the current position is greater than N, increment the count of valid arrangements.
  4. Iterate over the numbers from 1 to N.
  5. For each number, check if it has not been visited and meets the divisibility criteria.
  6. If the criteria are met, mark the number as visited and call calculate for the next position.
  7. After the recursive call, reset the visited status of the number.
  8. Return the count of valid arrangements.
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Approach # Brute Force

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