카카오 코딩테스트 - 후보키
http://tech.kakao.com/2018/09/21/kakao-blind-recruitment-for2019-round-1/ 2019 카카오 신입 공채 1차 코딩 테스트 문제 해설 [[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,0,0,0,0],[0,0,0,0,0,0,4,0,0,0],[0,0,0,0,0,4,4,0,0,0],[0,0,0,0,3,0,4,0,0,0],[0,0,0,2,3,0,0,0,5,5],[1,2,2,2,3,3,0,0,0,5],[1,1,1,0,0,0,0,0,0,5]]2 tech.kakao.com 문제는 관계형 데이터베이스에서 relation(2차원 배열)이 여기서 후보키의 개수를 찾는 문제이다..
2019. 8. 28.