https://swexpertacademy.com/main/code/problem/problemDetail.do?contestProbId=AWIeV9sKkcoDFAVH
https://velog.io/@ouk/%EC%BD%94%EB%94%A9%ED%85%8C%EC%8A%A4%ED%8A%B8%EB%B0%B1%EC%A4%80-%EB%B0%B1%EC%A4%80-14891%EB%B2%88-%ED%86%B1%EB%8B%88%EB%B0%94%ED%80%B4-%EB%AC%B8%EC%A0%9C-Python%EC%9C%BC%EB%A1%9C-%EC%99%84%EB%B2%BD-%ED%95%B4%EA%B2%B0%ED%95%98%EA%B8%B0