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ArrayList > Array 변환1) int\[] arr = arraylist.stream().mapToInt(Integer::intValue).toArray()2) Integer\[] arr = list.toArray(new Integer0)Array > Arra

Problem Code

https://programmers.co.kr/learn/courses/30/lessons/12982

https://programmers.co.kr/learn/courses/30/lessons/42583

https://programmers.co.kr/learn/courses/30/lessons/42584 Problem

Problem Code Result

https://www.acmicpc.net/problem/10828

https://www.acmicpc.net/problem/10773

https://www.acmicpc.net/problem/4949

DFS 방식 이용numbers에 있는 숫자들을 더하고 빼는 2가지 경우로 뻗어나감\-> numbers에 있는 모든 숫자들을 다 사용하면 target과 비교

https://school.programmers.co.kr/learn/courses/30/lessons/12909?language=java

https://school.programmers.co.kr/learn/courses/30/lessons/118666

https://school.programmers.co.kr/learn/courses/30/lessons/1844

https://school.programmers.co.kr/learn/courses/30/lessons/43162

https://school.programmers.co.kr/learn/courses/30/lessons/42578A그룹의 원소가 a개, B그룹의 원소가 b개 있으면 조합의 수는 ab\-> A그룹에서만 선택하거나 B그룹에서만 선택하는 경우에는 (a+1)(b+1)

https://school.programmers.co.kr/learn/courses/30/lessons/43163

https://school.programmers.co.kr/learn/courses/30/lessons/77485?language=java시계반대방향으로 돌면서 값을 변화시키면 데이터 유실없이 변화 가능

https://www.acmicpc.net/problem/2606

https://school.programmers.co.kr/learn/courses/30/lessons/42842

https://school.programmers.co.kr/learn/courses/30/lessons/43105

https://school.programmers.co.kr/learn/courses/30/lessons/42626 Problem Code Result

https://school.programmers.co.kr/learn/courses/30/lessons/42579

https://school.programmers.co.kr/learn/courses/30/lessons/43164 Problem Code Result