Leetcode Problem 2647. Color the Triangle Red

2647. Color the Triangle Red

Leetcode Solutions

Pattern-Based Coloring

  1. Initialize an empty list to store the coordinates of the initially red triangles.
  2. Start from the bottom row and move upwards, applying the pattern described above.
  3. For each group of four rows, apply the pattern:
    • Color the first and every other triangle in the bottom row.
    • Color the second triangle in the second row from the bottom.
    • Color the third and every other triangle in the third row from the bottom.
    • Color the first triangle in the top row of the group.
  4. If there are remaining rows after groups of four have been processed, handle them according to the number of remaining rows.
  5. Always include the topmost triangle in the solution.
  6. Return the list of coordinates of the initially red triangles.
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Greedy Alternating Traverse

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