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Jayesh Patel
Lives in Pune, Maharashtra, India
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Jayesh Patel

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Search in a row wise and column wise sorted matrix. In this approach, we will start our search by looking at Right most element of first row. If Current Element = Search element, Return True, element found. Java Program to Search in a row wise and column wise sorted matrix.
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Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWord.
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Lets see 2 approaches to solve problem. one with constant extra space and another approach where we use Queue.
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Find Saddle point in a matrix. What is Saddle point of Matrix? Element is said to be Saddle point of Matrix if it is both a minimum of its row and a maximum of its column or vice versa. A matrix may have 1 or 2 saddle points or may not have a saddle point. Java Program to Print Saddle point of Matrix
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Print Nodes at given Level
Given a Binary Tree, Print all Nodes that are at K distance from root node in Binary Tree. You can also think of this question as Print nodes at a given level. Algorithm: 1. Do a Pre-Order traversal of Tree and and decrement K each time you move to left or right. 2. when K = 0, it means that is the level we are interested in. So print the Node and return.
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Print Matrix Diagonally or Loop diagonally through two dimensional array or Traverse an array diagonally or print elements of Matrix in Diagonal order. Java Program to Print Matrix Diagonally.
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Print nodes at K distance from Leaf node in binary tree. Given a Binary Tree, Print all Nodes that are at K distance from leaf node in Binary Tree. We already saw how to Print Nodes at K distance from Root in Binary Tree. Java Program to Print Nodes at K distance from Leaf Node.
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Rotate matrix by 90 degree. There are 2 ways to Rotate a Matrix by 90 degrees clockwise. In Place or using extra memory. For Rotating a matrix to 90 degrees clockwise, We need to transform each row of a Matrix to a column in rotated matrix. Java Program to Rotate a Matrix by 90 degrees
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