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🧷 문제 링크
https://www.acmicpc.net/problem/1688
🧭 풀이 시간
45분
👀 체감 난이도
✏️ 문제 설명
어떤 점이 주어진 N각형의 내부 혹은 경계에 있는지 판별해보자.
🔍 풀이 방법
Ray Casting
-> 점으로부터 임의의 반직선을 그어서 다각형과 홀수 번 만난다면, 그 점은 다각형 내부에 있다.
⏳ 회고
경계 처리를 잘못해서 반례가 터져나왔다