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소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem Given two binary search trees root1 and root2, return a list containing all the integers from both trees sorted in ascending order. Example 1: Input: root1 = [2,1,4], root2 = [1,0,3] Output: [0,1,1,2,3,4] Example 2: Input: root1 = [1,null,8], root2 = [8,1] Output: [1,1,8,8] Constraints: The number of nodes in each tree is in the range [0, 5000]. -10^5 test(Tr..

소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem An integer has sequential digits if and only if each digit in the number is one more than the previous digit. Return a sorted list of all the integers in the range [low, high] inclusive that have sequential digits. Example 1: Input: low = 100, high = 300 Output: [123,234]Example 2: Input: low = 1000, high = 13000 Output: [1234,2345,3456,4567,5678,6789,12345]C..

소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem Given an array of integers arr, return true if and only if it is a valid mountain array. Recall that arr is a mountain array if and only if: arr.length >= 3 There exists some i with 0 < i < arr.length - 1 such that: arr[0] < arr[1] < ... < arr[i - 1] < arr[i] arr[i] > arr[i + 1] > ... > arr[arr.length - 1] Example 1: Input: arr = [2,1] Output: false Example 2..

소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem We define the usage of capitals in a word to be right when one of the following cases holds: All letters in this word are capitals, like "USA". All letters in this word are not capitals, like "leetcode". Only the first letter in this word is capital, like "Google". Given a string word, return true if the usage of capitals in it is right. Example 1: Input: wor..

소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem Alice and Bob take turns playing a game, with Alice starting first. Initially, there are n stones in a pile. On each player's turn, that player makes a move consisting of removing any non-zero square number of stones in the pile. Also, if a player cannot make a move, he/she loses the game. Given a positive integer n, return true if and only if Alice wins ..

본 포스팅은 백기선님의 스프링과 JPA 기반 웹 애플리케이션 개발 강의를 참고하여 작성하였습니다. 소스 코드는 여기 있습니다. (commit hash: 821d983) > git clone https://github.com/lcalmsky/spring-boot-app.git > git checkout 821d983 ℹ️ squash merge를 사용해 기존 branch를 삭제하기로 하여 앞으로는 commit hash로 포스팅 시점의 소스 코드를 공유할 예정입니다. Overview 프로필 뷰를 구현합니다. Description 프로필은 누가 보느냐에 따라 달라지고 정보 입력 유무에 따라 달라져야 합니다. 인증된 사용자가 자기 프로필 화면을 조회할 때는 편집 가능해야하고, 다른 사람의 프로필을 조회할 때는 ..

소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem There are n gas stations along a circular route, where the amount of gas at the ith station is gas[i]. You have a car with an unlimited gas tank and it costs cost[i] of gas to travel from the ith station to its next (i + 1)th station. You begin the journey with an empty tank at one of the gas stations. Given two integer arrays gas and cost, return the startin..

소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem Koko loves to eat bananas. There are n piles of bananas, the ith pile has piles[i] bananas. The guards have gone and will come back in h hours. Koko can decide her bananas-per-hour eating speed of k. Each hour, she chooses some pile of bananas and eats k bananas from that pile. If the pile has less than k bananas, she eats all of them instead and will not eat..

소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem Given the head of a linked list, return the node where the cycle begins. If there is no cycle, return null. There is a cycle in a linked list if there is some node in the list that can be reached again by continuously following the next pointer. Internally, pos is used to denote the index of the node that tail's next pointer is connected to (0-indexed). I..

소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem You have a long flowerbed in which some of the plots are planted, and some are not. However, flowers cannot be planted in adjacent plots. Given an integer array flowerbed containing 0's and 1's, where 0 means empty and 1 means not empty, and an integer n, return if n new flowers can be planted in the flowerbed without violating the no-adjacent-flowers..