Compute Largest Product of Contiguous Digits
Given two integers num and k, return the largest product of k contiguous digits in num. Note: num is guaranteed to have >= k digits. Example 1 Input num …
Simple Vertical Cipher Algorithm
Given a string s and an integer n, rearrange s into n rows so that s can be read vertically (top-down, left to right). Constraints Length of s ≤ …
Teaching Kids Programming – Introduction to Math Induction
Teaching Kids Programming: Videos on Data Structures and Algorithms Math Induction is a powerful tool that allows us to prove the correctness of a formula (Proposition). To do this, …
Find the Length of the Collatz Sequence
Given a positve integer n, find the length of its Collatz sequence. The Collatz sequence is generated sequentially where: n = n / 2 if n is even n …
Teaching Kids Programming – Solving the Jump Game by Depth First Search Algorithm
Teaching Kids Programming: Videos on Data Structures and Algorithms Yesterday, we talked about the Breadth First Search Algorithm. We are solving the same Jump Game problem today by using …
Algorithm to Compute the Concatenation of Consecutive Binary Numbers
Given an integer n, return the decimal value of the binary string formed by concatenating the binary representations of 1 to n in order, modulo 10^9 + 7. Example …