Leetcode Problem 768. Max Chunks To Make Sorted II

768. Max Chunks To Make Sorted II

Leetcode Solutions

Using Left Max and Right Min Arrays

  1. Initialize two arrays, left_max and right_min, of the same length as the input array arr.
  2. Set left_max[0] to arr[0] and iterate through arr from left to right, populating left_max such that left_max[i] is the maximum value from arr[0] to arr[i].
  3. Set right_min[arr.length - 1] to arr[arr.length - 1] and iterate through arr from right to left, populating right_min such that right_min[i] is the minimum value from arr[i] to arr[arr.length - 1].
  4. Initialize a variable count to 0 to keep track of the number of chunks.
  5. Iterate through the array from 0 to arr.length - 2 and increment count each time left_max[i] is less than or equal to right_min[i + 1].
  6. After the loop, increment count by 1 to account for the last chunk.
  7. Return count as the maximum number of chunks.
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Monotonic Stack Approach

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