Juni_Dev_log

🔥 문제 Given a binary tree root and a linked list with head as the first node. Return True if all the elements in the linked list starting from the head correspond to some downward path connected in the binary tree otherwise return False. In this context downward path means a path that starts at some node and goes downwards. Example 1: Input: head = [4,2,8], root = [1,4,4,null,2,2,null,1,null,6,8,..

▶ Raindrops 📌 Problem Introduction Your task is to convert a number into a string that contains raindrop sounds corresponding to certain potential factors. A factor is a number that evenly divides into another number, leaving no remainder. The simplest way to test if a one number is a factor of another is to use the modulo operation. The rules of raindrops are that if a given number: has 3 as a ..

▶ Hamming 🧬 📌 (Problem) Introduction Calculate the Hamming Distance between two DNA strands. Your body is made up of cells that contain DNA. Those cells regularly wear out and need replacing, which they achieve by dividing into daughter cells. In fact, the average human body experiences about 10 quadrillion cell divisions in a lifetime! When cells divide, their DNA replicates too. Sometimes duri..

▶ ETL (Problem) Introduction We are going to do the Transform step of an Extract-Transform-Load. ETL Extract-Transform-Load (ETL) is a fancy way of saying, "We have some crufty, legacy data over in this system, and now we need it in this shiny new system over here, so we're going to migrate this." (Typically, this is followed by, "We're only going to need to run this once." That's then typically..