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🧷 문제 링크
https://www.acmicpc.net/problem/11758
🧭 풀이 시간
20분
👀 체감 난이도
✏️ 문제 설명
두 벡터의 방향이 어떻게 되니?
🔍 풀이 방법
외적을 사용해서 풀었다.
외적의 크기는 두 벡터가 이루는 평행사변형의 넓이이고, 외적의 부호는 두 벡터의 회전 방향이다.
⏳ 회고
이런거 오랜만이야, 너무 재밌어