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🧷 문제 링크
https://www.acmicpc.net/problem/14921
🧭 풀이 시간
10분
👀 체감 난이도
✏️ 문제 설명
-1억 ~ 1억의 특성값을 갖는 용액들이 있을 때
두 용액을 합성했을 때 특성값의 합이 0에 가장 가까운 경우의 특성값을 구하는 문제입니다.
🔍 풀이 방법
투포인터를 활용하여 풀었습니다.
문제 조건에서 입력자체가 정렬되어 있기 때문에 왼쪽끝 오른쪽끝에서 시작하여 합이 양수, 음수를 분기로 하여 처리했습니다.
0에 가깝다는 것은 절대값을 활용하여 판단했습니다.
⏳ 회고
처음에 음수일 때도 양수(절대값)으로 출력해서 틀렸는데 예제를 잘 봐야겠습니다.