Depth First Search Algorithm to Compute the Sum of Nodes with Even Grandparent Values
Given a binary tree root, return the sum of all node values whose grandparents have an even value. Constraints 0 ≤ n ≤ 100,000 where n is the number …
Teaching Kids Programming – Prefix Sum Algorithm to Compute the Interval Sums
Teaching Kids Programming: Videos on Data Structures and Algorithms Given an array of numbers, if we want to find out the sum of the interval, we can do this …
Complete an Arithmetic Sequence by Finding Missing Number
You are given a list of integers nums that used to be an arithmetic sequence. Given that a number was removed, and that the number was not the first …
Algorithm to Remove Duplicates in Linked List using Hash Set
Given a singly linked list node, remove nodes with duplicate values while maintaining relative order of the original list. Constraints n ≤ 100,000 where n is the number of …
Teaching Kids Programming – Hexadecimal Numbers Conversion
Teaching Kids Programming: Videos on Data Structures and Algorithms Algorithm to Convert Decimal Numbers to Hexadecimal Hexadecimal Numbers (base 16 because hex is 6 and decimal is 10) use …
Recursive Algorithm to Convert a List to Binary Search Tree
Given a sorted list nums of size n, construct a binary search tree by Taking nums as the root where k = floor(n / 2). Recursively constructing the left …