문제 링크 : https://school.programmers.co.kr/learn/courses/30/lessons/12973

코딩 테스트용 자바 기본 문법들

https://school.programmers.co.kr/learn/courses/30/lessons/42584

문제 링크 : https://school.programmers.co.kr/learn/courses/30/lessons/43105

문제 링크 : https://school.programmers.co.kr/learn/courses/30/lessons/12980