About This Pattern
Master the Matrix Manipulation pattern by practicing these problems organized by difficulty.Focus on the Key Signals - these are the indicators that tell you when to use this pattern.
Medium (2)
Rotate Image
Rotate n×n 2D matrix 90 degrees clockwise in-place.
Key Signals:
Transpose then reverse rowsOr layer by layer rotationIn-place swaps
Set Matrix Zeroes
Set entire row and column to 0 if element is 0, in-place with O(1) space.
Key Signals:
Use first row/col as markersTwo-pass approachHandle first row/col separately