프로그래머스
뉴스클러스터링
https://school.programmers.co.kr/learn/courses/30/lessons/17677
땅따먹기
https://school.programmers.co.kr/learn/courses/30/lessons/12913
점프와순간이동
https://school.programmers.co.kr/learn/courses/30/lessons/12980
백준
https://www.acmicpc.net/problem/1987
(냅색)
https://www.acmicpc.net/problem/1535
https://www.acmicpc.net/problem/12865
https://www.acmicpc.net/problem/1495
