Leetcode Problem 1133. Largest Unique Number

1133. Largest Unique Number

Leetcode Solutions

Using Hash Map

  1. Create a hash map to store the frequency of each number in the array.
  2. Iterate over the array, updating the frequency of each number in the hash map.
  3. Initialize a variable result to -1 to keep track of the largest unique number.
  4. Iterate over the hash map entries. For each entry, check if the value (frequency) is 1.
  5. If the frequency is 1, update result to be the maximum of the current result and the key (number).
  6. Return result.
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