Leetcode Problem 2352. Equal Row and Column Pairs

2352. Equal Row and Column Pairs

Leetcode Solutions

Approach: Hash Map

  1. Create an empty hash map row_counter and set count to 0.
  2. For each row row in the grid, convert it into an equivalent hashable object and use it as a key to the row_counter. Increment the value of the corresponding key by 1.
  3. For each column in the grid, convert it into the same type of hashable object and check if it appears in the row_counter. If it does, increment count by the frequency.
  4. Return the answer count.
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Approach: Brute Force

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