Leetcode Problem 1914. Cyclically Rotating a Grid

1914. Cyclically Rotating a Grid

Leetcode Solutions

Layer-by-Layer Rotation

  1. Calculate the number of layers in the matrix, which is min(m, n) / 2.
  2. For each layer, calculate the indices of the elements in the layer and store them in a list.
  3. Convert the layer into a 1D array using the stored indices.
  4. Rotate the 1D array by k positions using modulo operation to handle large k values.
  5. Map the rotated 1D array back to the 2D matrix using the stored indices.
  6. Repeat steps 2-5 for each layer.
  7. Return the rotated matrix.
UML Thumbnail

In-place Rotation with Four Pointers

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