[20250612] BOJ / G3 / 세 용액 / 김수연 #346
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🧷 문제 링크
https://www.acmicpc.net/problem/2473
🧭 풀이 시간
30분
👀 체감 난이도
✏️ 문제 설명
주어진 용액들 중 3개의 용액을 선택해서 0에 가장 가까운 혼합 용액 만드려고 할 때, 세 용액 찾기
🔍 풀이 방법
주어진 용액들 오름차순으로 정렬한 뒤,
하나의 용액을 무조건 사용한다고 가정하고, 해당 용액보다 값이 큰 용액들 중에서 나머지 두개의 용액을 찾기 위해서 투포인터 사용
값이 -1,000,000,000 이상 1,000,000,000 이하여서 덧셈을 할 때를 대비해서 Long 사용하기
⏳ 회고
나름 전형적인 투포인터인거 같다