Leetcode Problem 1748. Sum of Unique Elements

1748. Sum of Unique Elements

Leetcode Solutions

Using HashMap to Count Frequencies

  1. Initialize an empty HashMap to store the frequency of each element.
  2. Iterate over the array, incrementing the frequency count of each element in the HashMap.
  3. Initialize a variable to store the sum of unique elements.
  4. Iterate over the entries of the HashMap.
  5. If the frequency of an element is exactly one, add the element (the key) to the sum.
  6. Return the sum.
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Brute Force Approach

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