Leetcode Problem 2870. Minimum Number of Operations to Make Array Empty

2870. Minimum Number of Operations to Make Array Empty

Leetcode Solutions

Greedy Approach with Frequency Counting

  1. Create a frequency map to count the occurrences of each number in the array.
  2. Initialize a variable operations to store the total number of operations needed.
  3. Iterate over the frequency map. a. If any number occurs only once, return -1 as it's impossible to make the array empty. b. Calculate the number of operations needed for the current number by dividing its count by 3 and adding 1 if there's a remainder. c. Add the calculated number of operations to operations.
  4. Return the total operations as the result.
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Simulation with Priority Queue

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