Leetcode Problem 2615. Sum of Distances

2615. Sum of Distances

Leetcode Solutions

Prefix Sum and HashMap Approach

  1. Initialize a HashMap to store the list of indices for each unique number in nums.
  2. Iterate through nums and populate the HashMap with the indices of each number.
  3. For each list of indices in the HashMap, calculate the prefix sum.
  4. Initialize an array result to store the sum of distances for each index.
  5. Iterate through nums again and for each index i, use the prefix sum to calculate the sum of distances to the left and right.
  6. Store the calculated sum of distances in the result array.
  7. Return the result array.
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Brute Force Approach

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