HashTable

66 posts

Sum of nodes within K distance from target

Last Updated: 11 November 2023

Given a binary tree, a target node and a positive integer K on it, the task is to find the sum of all nodes within distance K from the targe ...read more

Tree

Binary Tree

Searching

DFS

Recursion

HashTable

DSA

Difference of count of distinct elements present to left and right for each array element

Last Updated: 15 February 2023

Given an array arr[] consisting of N integers, the task for each array element is to find the absolute difference between the count of disti ...read more

Maximum subarray sum with same first and last element formed by removing elements

Last Updated: 25 November 2021

Given an array arr[] of N integers, the task is to find the maximum sum of subarray having length an at least 2 whose first and last element ...read more

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Count of array elements to be removed to make absolute difference between each pair same

Last Updated: 11 April 2024

Given an array arr[] consisting of N integers, the task is to find the minimum number of array elements that must be removed such that the a ...read more

Minimum groups to split Array such that their each pair value difference and position difference are same

Last Updated: 15 February 2023

Given an array arr[] consisting of N integers, the task is to split the array into the minimum number of disjoint groups, such that differen ...read more

Partition an array into two subsets with equal count of unique elements

Last Updated: 16 August 2022

Given an array arr[] consisting of N integers, the task is to partition the array into two subsets such that the count of unique elements in ...read more

Print all array elements occurring at least M times

Last Updated: 26 April 2023

Given an array arr[] consisting of N integers and a positive integer M, the task is to find the number of array elements that occur at least ...read more

Technical Scripter 2020

DSA

Count subarrays having exactly K elements occurring at least twice

Last Updated: 24 June 2021

Given an array arr[] consisting of N integers and a positive integer K, the task is to count the number of subarrays having exactly K elemen ...read more

Technical Scripter 2020

DSA

Modify string by inserting characters such that every K-length substring consists of unique characters only

Last Updated: 27 May 2021

Given string S of size N consisting of K distinct characters and (N - K) '?'s, the task is to replace all '?' with existing characters from ...read more

Technical Scripter 2020

DSA

Maximum distance between two elements whose absolute difference is K

Last Updated: 14 March 2023

Given an array arr[] and a number K, the task to find the maximum distance between two elements whose absolute difference is K. If it is not ...read more

Count of index pairs with equal elements in an array | Set 2

Last Updated: 13 June 2022

Given an array arr[] of N elements. The task is to count the total number of indices (i, j) such that arr[i] = arr[j] and i != jExamples:Inp ...read more

K most occurring strings

Last Updated: 21 February 2023

Given an array arr[] of N strings and an integer K, the task is to print K strings which occurred the most number of times in the arr[]. If ...read more

Competitive Programming

Minimum distance between any most frequent and least frequent element of an array

Last Updated: 13 September 2021

Given an integer array arr[] of size N, the task is to find the minimum distance between any most and least frequent element of the given ar ...read more

First subarray with negative sum from the given Array

Last Updated: 04 December 2023

Given an array arr[] consisting of N integers, the task is to find the start and end indices of the first subarray with a Negative Sum. Prin ...read more

Competitive Programming

Count quadruplets(A, B, C, D) till N such that sum of square of A and B is equal to that of C and D

Last Updated: 16 June 2022

Given a number N, the task is to find the number of quadruples such that a2 + b2 = c2 + d2 where (1 = a, b, c, d = N).Example:Input: N = 2Ou ...read more

Arrays

Mathematical

Competitive Programming

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