## Majority Element – Part 1

Objective: Given an array of integer write an algorithm to find the majority element in it (if exist). Majority Element: If an element appears more than n/2 times in array where n is the size...

Objective: Given an array of integer write an algorithm to find the majority element in it (if exist). Majority Element: If an element appears more than n/2 times in array where n is the size...

Objective: Given a linked list and integer ‘k’, write an algorithm to reverse the linked list in groups of size ‘k’. Example: Approach: Earlier we have seen how to reverse a linked list, solution...

Objective: Given a string, find a longest palindromic subsequence in it. What is Longest Palindromic Subsequence: A longest palindromic subsequence is a sequence that appears in the same relative order, but not necessarily contiguous(not...

Objective: – Given a binary tree, Do the reverse level order traversal. In our earlier post we have seen normal Level Order Traversal. In reverse level order traversal we first need to print the...

Objective: Given a Linked List and a number k, Swap Kth Node from the front with the Kth Node from the End Example: ->10->20->30->40->50->60->70 Swapping 1 Node from the Front and from the End...

Objective: – Given a inorder and postorder traversal, write an algorithm to construct a binary tree from that. This problem was asked in the Microsoft coding competition. Input: Inorder and postorder traversals Similar Problems:...

Objective: Given a Binary tree, find out whether its binary search tree or not. Input: A Binary Tree. Output: True or false based on whether tree is BST ot not. Approach: Method 1 :...