Tag: recursion
Teaching Kids Programming: Videos on Data Structures and Algorithms A gene string can be represented by an 8-character long string, with choices from ‘A’, ‘C’, ‘G’, and ‘T’. Suppose …
Teaching Kids Programming: Videos on Data Structures and Algorithms The count-and-say sequence is a sequence of digit strings defined by the recursive formula: countAndSay(1) = “1” countAndSay(n) is the …
Teaching Kids Programming: Videos on Data Structures and Algorithms Given two positive integers a and b, return the number of common factors of a and b. An integer x …
Teaching Kids Programming: Videos on Data Structures and Algorithms Given the root of a binary tree and an integer targetSum, return true if the tree has a root-to-leaf path …
Teaching Kids Programming: Videos on Data Structures and Algorithms You are given two positive integers startPos and endPos. Initially, you are standing at position startPos on an infinite number …