Remove Duplicate Numbers by using a Hash Map
Given a list of integers nums, remove numbers that appear multiple times in the list, while maintaining order of the appearance in the original list. It should use O(k) …
Tag: python
Teaching Kids Programming – Longest Consecutive Run of 1s in Binary
Teaching Kids Programming: Videos on Data Structures and Algorithms Given a non-negative integer n, return the length of the longest consecutive run of 1s in its binary representation. Constraints …
Teaching Kids Programming – Breadth First Search Algorithm to Check the Completeness of a Binary Tree
Teaching Kids Programming: Videos on Data Structures and Algorithms Given the root of a binary tree, determine if it is a complete binary tree. In a complete binary tree, …
Teaching Kids Programming – Depth First Search Algorithm to Find the Only Child in Binary Tree
Teaching Kids Programming: Videos on Data Structures and Algorithms Given a binary tree root, return the number of nodes that are an only child. A node x is an …
Finding the Second Largest Digit in a String
Given an alphanumeric string s, return the second largest numerical digit that appears in s, or -1 if it does not exist. An alphanumeric string is a string consisting …