1. Find a specific pair in matrix
  2. Find shortest distance of every cell from landmine in a Maze
  3. Find shortest safe route in a path with landmines
  4. Shortest path in a Binary Maze
  5. Occurrences of an element in row wise and column wise sorted matrix
  6. Find Maximum Sum Submatrix in a given matrix
  7. In-place rotate the matrix by 180 degrees
  8. Create a matrix with alternating rectangles of O and X
  9. Find all rectangles filled with 0
  10. Common elements in all rows of a given matrix
  11. Find a common element in all rows of a given row-wise sorted matrix
  12. Collect maximum points in a matrix by satisfying given constraints
  13. Count Negative Numbers in a Column-Wise and Row-Wise Sorted Matrix
  14. Shift all Matrix Elements by 1 in Spiral Order
  15. Print matrix in antispiral form
  16. Given an n x n square matrix, find sum of all sub-squares of size k x k
  17. Maximum sum square sub-matrix of given size
  18. Print unique rows in a given boolean matrix
  19. Count number of paths in a matrix with given cost to reach destination cell
  20. Construct Ancestor Matrix from a Given Binary Tree
  21. Construct tree from ancestor matrix
  22. Collect maximum points in a grid using two traversals
  23. Simplify the directory path
  24. Populating Next Right Pointers in Each Node II
  25. Minimum Sum Path in a Triangle