[BOJ 11723] 집합 - #113
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풀이 요약
1부터20까지의 집합 상태를 정수 비트마스크 하나로 관리했습니다.add,remove,check,toggle은 비트 연산으로 처리하고,all,empty는 전체 상태를 갱신했습니다.O(1)에 처리해 많은 명령 수에도 빠르게 동작하도록 했습니다.Link
https://velog.io/@sh0723/PS-%EB%B0%B1%EC%A4%80-11723%EB%B2%88-%EC%A7%91%ED%95%A9
문제
Closes #112