# matrix Search in a row wise and column wise sorted matrix

You have given row-wise and column-wise sorted 2d matrix and integer k, write a program to search k in 2d matrix, i.e. find whether k is present or not. Each row is sorted from left to right, and the first integer of each row is greater than the last integer of the previous row. Note: This is an excellent problem to learn problem solving binary search in a 2d matrix. Rotate Matrix by 90 Degrees

Given an n x n 2D matrix, write a program to rotate the matrix by 90 degrees in the anticlockwise direction. The program should rotate the matrix 90 degrees without using extra space. In other words, we have to perform the rotation by modifying the 2D matrix directly. Note that this is an excellent problem to learn problem-solving using loops and the transpose of a matrix. Spiral Traversal of Matrix

Given a 2-dimensional matrix, write a program to print matrix elements in spiral order. We can imagine spiral traversal as an ordered set of matrix segments with horizontal and vertical boundaries, where both boundaries are reduced by one at each step. Note: This is an excellent problem to learn problem-solving using iteration and recursion.