[20251107] PGM / LV2 / 무인도 여행 / 강신지 #1344
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🧷 문제 링크
https://school.programmers.co.kr/learn/courses/30/lessons/154540
🧭 풀이 시간
35분
👀 체감 난이도
✏️ 문제 설명
숫자가 적힌 땅과 'X'인 바다로 구성된 지도가 주어졌을 때, 상하좌우로 연결된 숫자 땅덩어리는 무인도임. 각 섬마다 숫자를 모두 더한 뒤 오름차순으로 반환하는 문제
🔍 풀이 방법
BFS 써서 지도에서 방문하지 않은 숫자 땅을 발견할 때마다 상하좌우로 탐색해 해당 섬의 숫자를 누적하고, 탐색이 끝나면 리스트에 저장해 오름차순 정렬 후 반환
⏳ 회고