📢 본 포스팅에 활용되는 기본 문제 및 자료 출처는 HackerRank 임을 밝힙니다. https://www.hackerrank.com ■ 문제 https://www.hackerrank.com/challenges/full-score/problem Top Competitors | HackerRank Query a list of top-scoring hackers. www.hackerrank.com The following tables contain contest data: Hackers: The hacker_id is the id of the hacker, and name is the name of the hacker. Difficulty: The difficult_level is the level of ..