Leetcode Problem 2661. First Completely Painted Row or Column

2661. First Completely Painted Row or Column

Leetcode Solutions

HashMap with Row and Column Tracking

  1. Initialize a HashMap to store the position of each element in the matrix.
  2. Iterate over the matrix and fill the HashMap with the element as the key and its position (row, column) as the value.
  3. Initialize two arrays, rowCount and colCount, to keep track of the number of painted cells in each row and column.
  4. Iterate through the array arr. a. For each element, retrieve its position from the HashMap. b. Increment the corresponding rowCount and colCount. c. If any rowCount or colCount reaches the total number of columns or rows, record the index.
  5. Return the smallest recorded index where a row or column is completely painted.
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Brute Force with Early Termination

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