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🧷 문제 링크
https://www.acmicpc.net/problem/9019
🧭 풀이 시간
40분
👀 체감 난이도
✏️ 문제 설명
특정 숫자에 어떤 연산을 해서 어떤 값 도출하기, 값은 무조건 나온다 가정할때
🔍 풀이 방법
BFS로 가능한 경우를 모두 탐색하다, 값이 나오는 경우 지나온 연산을 모두 출력하면 된다
⏳ 회고
BFS인거 알면서 바로 재귀를 짜고 있는 나... BFS도 좀 익숙해지자
어떤것을 기준으로 방문 여부를 관리할지에 대해 고민하기. 스택오버플로우 터지면 방문 처리를 하지 않았는지 점검하기
문제 조건 제대로 읽기 -> 4자리인지 뒤늣게 발견함