Leetcode Problem 2475. Number of Unequal Triplets in Array

2475. Number of Unequal Triplets in Array

Leetcode Solutions

Brute Force Approach

  1. Initialize a counter res to 0 to store the number of valid triplets.
  2. Iterate over the array with three nested loops, with indices i, j, and k, ensuring that i < j < k.
  3. For each triplet (i, j, k), check if nums[i], nums[j], and nums[k] are pairwise distinct.
  4. If they are distinct, increment the counter res by 1.
  5. After all iterations, return the value of res.
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Frequency Map Approach

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