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🔍 DFS 알고리즘
WCD 1W
장소희
✔2-3 레벨의 난이도
✔2학년 1학기때 풀지 못했고, 여전히 건들지 않았음 😢
✔DFS/BFS를 각각 언제 활용해야 하는가? 🧐
❗️DFS와 BFS를 모름 ❗️
DFS와 BFS를 알기 전에, 그래프부터!
그래프
단순히 노드와 그 노드를 연결하는 간선을 하나로 모아 놓은 비선형 자료 구조
연결된 객체 간의 관계를 표현하는 자료구조
방향 그래프 / 무방향 그래프
트리 또한 그래프의 한 종류
DFS와 BFS는 그래프 탐색 알고리즘
💡A 도시에서 B 도시로 갈 수 있는가?
💡A 지점에서 B 지점으로 가는 가장 빠른 길은?
그래프의 모든 정점을 방문하는 것
한 눈에 보는 DFS와 BFS의 차이 👀
한 눈에 보는 DFS와 BFS의 차이 👀
DFS(Depth-First Search)
깊이 우선 탐색
DFS (Depth-First Search)
깊이 우선 탐색
특정 노드에서 시작해 다음 분기로 넘어가기 전에 해당 분기를 완벽하게 탐색하는 방법
💡 미로에서 한 방향으로 계속 가다가 막다른 길을 만나면 이전 갈림길로 돌아가 길을 탐색
그래프에 존재하는 모든 노드를 방문하고자 할 때 사용
너비 우선 탐색보다 검색 속도 느림
각 노드의 방문 여부를 반드시 확인해야함
무한루프 위험성
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1
2
1
2
3
1
4
1
4
5
1
4
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1
4
7
1
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👑 프로그래머스 적용 👑
👑 프로그래머스 적용 👑

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