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🧷 문제 링크
https://school.programmers.co.kr/learn/courses/30/lessons/49191
🧭 풀이 시간
50분
👀 체감 난이도
✏️ 문제 설명
선수들의 경기 결과가 주어질 때, 모든 다른 선수와의 승패 관계를 확실히 알 수 있는 선수의 수를 구하는 문제
🔍 풀이 방법
A가 B를 이기고 B가 C를 이기면 A가 C도 이김.
그 간접 관계를 다 표시하고(이기면 1, 지면 -1, 모르면 0) 모든 상대와 관계가 0이 아닌 선수를 count
⏳ 회고