Given a list of unique positive integers nums and a positive integer k, return the number of unique combinations that sum up to k. You may reuse numbers when …
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 …
Given a list of unique positive integers nums and a positive integer k, return the number of unique combinations that sum up to k. You may reuse numbers when …
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: 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 …
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 …