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🧷 문제 링크
https://www.acmicpc.net/problem/8981
🧭 풀이 시간
40분
👀 체감 난이도
✏️ 문제 설명
X에서 특정 처리(처리 코드 제공) 후 Y가 나왓을때, Y를 보고 X 구하기
🔍 풀이 방법
첫 값이 동일함을 확인하고, 값 채우기를 역으로 수행하면 원본 배열 나옴
⏳ 회고
쉽게 생각하면 의외로 쉽게 풀리는데.. 첨에 너무 어렵게 생각했던 것 같다. 첫 값이 고정인 것이 힌트인듯