[20251031] PGM / Lv2 / 전력망을 둘로 나누기 / 이강현#1279
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ShinHeeEul merged 1 commit intomainfrom Oct 31, 2025
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🧷 문제 링크
https://school.programmers.co.kr/learn/courses/30/lessons/86971
🧭 풀이 시간
20분
👀 체감 난이도
✏️ 문제 설명
전력망이 트리 구조로 존재함.
특정 전선을 끊어서 전력망을 둘로 나눌때, 두 전력망 속 노드 수의 차이가 가장 적을때 그 값을 구하기.
🔍 풀이 방법
완전탐색, bfs
한번만 나누면 되고 전선이 100개미만이라
n번 자르는데 한번 자를때, 자른 지점에서 원래 연결되어있던 애를 제외하고 bfs를 돌린 후 개수를 구함.
그리고 그 개수가 최적인지 판단하는 것을 반복.
⏳ 회고
ez