문제 링크 - https://swexpertacademy.com/main/code/problem/problemDetail.do?problemLevel=2&contestProbId=AV5PuPq6AaQDFAUq&categoryId=AV5PuPq6AaQDFAUq
문제 출처 - https://swexpertacademy.com/main/code/problem/problemDetail.do?problemLevel=3&contestProbId=AX_N3oSqcyUDFARi&categoryId=AX_N3oSqcyUDFARi&