[백준] 톱니바퀴
https://www.acmicpc.net/problem/14891
https://www.acmicpc.net/problem/14891
https://programmers.co.kr/learn/courses/30/lessons/43236?language=python3
11주차 학습정리 강의 복습 내용 개인 대회 회고글: https://velog.io/@naem1023/Relation-Extraction-%ED%9A%8C%EA%B3%A0
https://programmers.co.kr/learn/courses/30/lessons/42885
https://programmers.co.kr/learn/courses/30/lessons/42747