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Pull Request Overview
This pull request implements a solution for the BOJ TSP problem using a recursive DFS with memoization.
- Implements TSP solution using recursion with memoization
- Uses bit masking to represent visited cities
- Reads the input through BufferedReader and processes the TSP via a dp table
Seol-JY/202504/02 BOJ G1 외판원 순회.md
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The dp array size calculation may lead to an off-by-one error since the visited states range from 0 to (1<<N) - 1. Consider using 'dp = new int[N][1<<N]' to ensure all states are safely covered.
Suggested change
| dp = new int[N][(1<<N) - 1]; | |
| dp = new int[N][1<<N]; |
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🧷 문제 링크
https://www.acmicpc.net/problem/2098
🧭 풀이 시간
60분
👀 체감 난이도
✏️ 문제 설명
전형적인 TSP 문제, 근데 시간제한이 빡센..
🔍 풀이 방법
TSP는 결국 사이클이 형성되었을때의 최단거리 이므로, 시작 지점이 중요하지 않음.
DP 배열을 현재까지의 방문을 표현하는 비트와 마지막으로 방문한 지점 값으로 두고, 메모이제이션 수행
재귀 호출로 필요한 값 차례대로 구하고 종료
⏳ 회고
너무 어렵다... 뭔가 아이디어는 떠올랐는데 구현을 도저히 못하겠어서 참고함.