Leetcode Problem 2025. Maximum Number of Ways to Partition an Array

2025. Maximum Number of Ways to Partition an Array

Leetcode Solutions

Prefix and Suffix Sum with Difference Counting

  1. Calculate the prefix sum array pref and the suffix sum array suff for the input array nums.
  2. Initialize two hash maps left and right to store the frequency of differences between prefix and suffix sums.
  3. Iterate through the array to populate the right hash map with the differences.
  4. Initialize a variable ans to store the maximum number of partitions, starting with the count of 0 in the right hash map.
  5. Iterate through the array again, for each index i, calculate the difference d as k - nums[i].
  6. Update ans with the sum of counts of d in left and -d in right.
  7. Transfer the count of the current difference from right to left.
  8. Return the maximum value of ans.
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Brute Force with Single Element Modification

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