1. 키패드 누르기 https://school.programmers.co.kr/learn/courses/30/lessons/67256 2. 마법의 엘리베이터 https://school.programmers.co.kr/learn/courses/30/lessons/148653 3. 디펜스 게임 https://school.programmers.co.kr/learn/courses/30/lessons/142085 4. 하노이의 탑 https://school.programmers.co.kr/learn/courses/30/lessons/12946 5. 아날로그 시계 (★★) https://school.programmers.co.kr/learn/courses/30/lessons/250135]  못푼 문제당 폭탄 한발씩 날라갑니다
https://school.programmers.co.kr/learn/courses/30/lessons/67256
https://school.programmers.co.kr/learn/courses/30/lessons/148653
https://school.programmers.co.kr/learn/courses/30/lessons/142085
https://school.programmers.co.kr/learn/courses/30/lessons/12946
https://school.programmers.co.kr/learn/courses/30/lessons/250135]
못푼 문제당 폭탄 한발씩 날라갑니다