Heap 📌 What is heap? 1️⃣ A Heap is a special Tree-based data structure in which the tree is a complete binary tree. 2️⃣ All the nodes of the heap are arranged in a specific order. In Java, Pri...

Heap In Java, PriorityQueue can be used as a Heap. Detail Task 더 맵게 in Programmers (Level 2) 📌 Problem https://programmers.co.kr/learn/courses/30/lessons/42626 📌 The point Use PriorityQu...

Hash HashMap<Key, Value> Task 2. 위장 in Programmers (Level 2) 📌 Problem https://programmers.co.kr/learn/courses/30/lessons/42578 📌 The point Use number of cases ex. If {hat...

Hash HashMap(Key, Value) Task 전화번호 목록 in Programmers (Level 2) 📌 Problem https://programmers.co.kr/learn/courses/30/lessons/42577 📌 Answer 1. Use HashMap The point HashMap.containsKey(Str...

Sort Task 2. H-Index in Programmers (Level 2) 📌 Problem https://programmers.co.kr/learn/courses/30/lessons/42747 📌 Answer 1. Use Arrays.sort() import java.util.Arrays; class Solution { p...