Matrices
2-D grids, traversal, and matrix manipulation.
Foundation
Learn the invariant, apply it independently, then pass the Matrices checkpoint.
- Search a sorted matrix (Easy)
Checkpoint
A graded check of the core Matrices reasoning skills.
Pattern Quest
Practice recognizing matrices problem shapes.
Matrices
Practice coordinate-safe grid traversal, row and column invariants, boundary handling, flood fill, and dynamic state across two-dimensional inputs.
- Battleships in a Board (Medium)
- Check if Word Can Be Placed In Crossword (Medium)
- Diagonal Traverse (Medium)
- Fill rows and columns with 1s (Medium)
- Find path between cells (Medium)
- Longest increasing path (Hard)
- Longest Increasing Path in a Matrix (Hard)
- Longest Line of Consecutive One in Matrix (Medium)
- Max region (Medium)
- Min distance of meeting point (Hard)
- Nearest bikes (Easy)
- Print matrix in spiral order (Medium)
- Remove All Ones With Row and Column Flips (Medium)
- Rotate matrix by 90 degrees (Medium)
- Search a 2D Matrix II (Medium)
- Spiral Matrix (Medium)
- Word search on board (Medium)