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소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem Given an array of non-negative integers arr, you are initially positioned at start index of the array. When you are at index i, you can jump to i + arr[i] or i - arr[i], check if you can reach to any index with value 0. Notice that you can not jump outside of the array at any time. Example 1: Input: arr = [4,2,3,0,3,1,2], start = 5 Output: true Explanation: A..

소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem Given head which is a reference node to a singly-linked list. The value of each node in the linked list is either 0 or 1. The linked list holds the binary representation of a number. Return the decimal value of the number in the linked list. Example 1: Input: head = [1,0,1] Output: 5 Explanation: (101) in base 2 = (5) in base 10 Example 2: Input: head = [0] O..

소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem We have n chips, where the position of the ith chip is position[i]. We need to move all the chips to the same position. In one step, we can change the position of the ith chip from position[i] to: position[i] + 2 or position[i] - 2 with cost = 0. position[i] + 1 or position[i] - 1 with cost = 1. Return the minimum cost needed to move all the chips to the same..

소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem The thief has found himself a new place for his thievery again. There is only one entrance to this area, called root. Besides the root, each house has one and only one parent house. After a tour, the smart thief realized that all houses in this place form a binary tree. It will automatically contact the police if two directly-linked houses were broken into on..

본 포스팅은 백기선님의 스프링과 JPA 기반 웹 애플리케이션 개발 강의를 참고하여 작성하였습니다. 소스 코드는 여기 있습니다. (commit hash: a7de4fe) > git clone https://github.com/lcalmsky/spring-boot-app.git > git checkout a7de4fe ℹ️ squash merge를 사용해 기존 branch를 삭제하기로 하여 앞으로는 commit hash로 포스팅 시점의 소스 코드를 공유할 예정입니다. Overview 이번 포스팅에서는 내비게이션 바에 아이콘 추가하고, 프로필 기본 이미지(아바타)를 설정합니다. 라이브러리 설치 사용할 라이브러리를 static resource 디렉토리에 설치합니다. > cd src/main/resources/s..

소스 코드는 여기 있습니다. 문제는 여기 있습니다. Problem You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint stopping you from robbing each of them is that adjacent houses have security systems connected and it will automatically contact the police if two adjacent houses were broken into on the same night. Given an integer array ..