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Specific Level Order Traversal of Binary Tree

Given a Binary Tree, the task is to perform Specific Level Order Traversal of the tree such that at each level print 1st element then… Read More » The post Specific Level Order Traversal of Binary Tree appeared first on GeeksforGeeks.

Queries for count of array elements with values in given range with updates

Given an array arr[] of size N and a matrix Q consisting of queries of the following two types: 1 L R : Print the… Read More » The post Queries for count of array elements with values in given range with updates appeared first on GeeksforGeeks.

Median of sliding window in an array | Set 2

Prerequisites: Policy based data structure, Sliding window technique. Given an array of integer arr[] and an integer K, the task is to find the median… Read More » The post Median of sliding window in an array | Set 2 appeared first on GeeksforGeeks.

Maximal Independent Set in an Undirected Graph

Given an undirected graph defined by the number of vertex V and the edges E[ ], the task is to find Maximal Independent Vertex Set… Read More » The post Maximal Independent Set in an Undirected Graph appeared first on GeeksforGeeks.

Longest subarray with difference exactly K between any two distinct values

Given an array arr[] of length N and an integer K, the task is to find the longest subarray with difference between any two distict… Read More » The post Longest subarray with difference exactly K between any two distinct values appeared first on GeeksforGeeks.

Kth diagonal from the top left of a given matrix

Given a squared matrix M[ ][ ] of N * N dimensions, the task is to find the Kth diagonal of the matrix, starting from… Read More » The post Kth diagonal from the top left of a given matrix appeared first on GeeksforGeeks.

Reverse a subarray to maximize sum of even-indexed elements of given array

Given an array arr[], the task is to maximize the sum of even-indexed elements by reversing a subarray and print the maximum sum obtained. Examples:… Read More » The post Reverse a subarray to maximize sum of even-indexed elements of given array appeared first on GeeksforGeeks.

Check if frequency of each element in given array is unique or not

Given an array arr[] of N positive integers where the integers are in the range from 1 to N, the task is to check whether… Read More » The post Check if frequency of each element in given array is unique or not appeared first on GeeksforGeeks.

Construct a sequence from given frequencies of N consecutive integers with unit adjacent difference

Given an array freq[] which stores the frequency of N integers from 0 to N – 1. The task is to construct a sequence where… Read More » The post Construct a sequence from given frequencies of N consecutive integers with unit adjacent difference appeared first on GeeksforGeeks.

Replace all occurrences of character X with character Y in given string

Given a string str and two characters X and Y, the task is to write a recursive function to replace all occurrences of character X… Read More » The post Replace all occurrences of character X with character Y in given string appeared first on GeeksforGeeks.

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