3주차 기본 문제 #9
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3주차 기본 문제 #9
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Kwonkyu
reviewed
Sep 8, 2021
Comment on lines
+55
to
+57
| for (Tiii next : adj.get(i)) { // 1번 바이러스들 부터 큐에 순차적으로 저장 | ||
| q.add(next); | ||
| vi[next.y][next.x] = true; // 방문처리 |
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저는 우선순위 큐로 날짜까지 저장해서 순차적으로 바이러스 셀에 접근할 수 있도록 했는데 이걸 보니 그냥 1번 바이러스부터 큐에 넣어주기만 하면 되는 거였네요... 간단한 방법인데 막상 풀 때는 생각이 안났네요 ㅋㅋㅋ
Kwonkyu
reviewed
Sep 8, 2021
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| public class Main{ | ||
| static int N, M; | ||
| static ArrayList<ArrayList<Integer>> adj; |
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풀이 자체는 비슷한 것 같은데 제 코드는 메모리가 47404KB, 찬의님 코드는 메모리가 33872KB가 나오더라구요. 왜 그런가 찾아봤는데 저는 Map을 사용하고 찬의님은 ArrayList를 사용해서 그런 것 같습니다. 스택오버플로우의 답변을 보니까 HashMap이 키, 값을 둘 다 저장해야 하고 load factor를 유지하기 위해서 메모리를 좀 더 많이 소모한다고 하더라구요. 저도 ArrayList를 활용하는 방안으로 풀이를 작성해야겠습니다.
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