[20250616] BOJ / P3 / Xor Maximization / 권혁준#362
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ShinHeeEul merged 1 commit intomainfrom Jun 16, 2025
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🧷 문제 링크
https://www.acmicpc.net/problem/11191
🧭 풀이 시간
21분
👀 체감 난이도
✏️ 문제 설명
N개의 수들을 적절히 골라 XOR 했을 때의 최댓값 구하기
🔍 풀이 방법
[사용한 알고리즘]
N개의 수들 각각에 대해, 가장 큰 비트부터 내려가며 각 비트에 대한 basis를 구한다.
이들 basis끼리는 선형독립이기 때문에 이 basis들 만으로 N개의 모든 수에 대한 XOR조합을 표현할 수 있다.
답을 구할 때는 가장 큰 비트의 basis부터 xor해보며 최댓값을 갱신해주면 된다.
⏳ 회고
전에 비슷한 걸 했었어서 기억남