matrix

Matrix

2D array problems and matrix algorithms.

Key Concepts Covered

• Matrix traversal patterns
• Spiral traversal
• Matrix rotation
• Matrix multiplication
• Searching in sorted matrix
• Dynamic programming on grids
• Path finding in matrix
• Island problems

Tips

• Draw the matrix and visualize the pattern
• Watch out for row-major vs column-major order
• Use direction arrays for 4-directional movement: dx[]={-1,1,0,0}, dy[]={0,0,-1,1}
• Many matrix problems reduce to graph problems
• Consider in-place operations to save space