set

문제 설명https://school.programmers.co.kr/learn/courses/30/lessons/43163   제한 사항   입출력 예   풀이import java.util.List;import java.util.ArrayList;import java.util.HashSet;class Solution { ArrayList wordList = new ArrayList(); HashSet check = new HashSet(); public int solution(String begin, String target, String[] words) { return bfs(List.of(begin), words, target, 0); } priv..

문제 설명https://school.programmers.co.kr/learn/courses/30/lessons/131130   제한 사항   입출력 예   풀이import java.util.HashSet;import java.util.ArrayList;class Solution { public int solution(int[] cards) { ArrayList> indexGroupList = new ArrayList(); HashSet checkSet = new HashSet(); for (int i = 0; i indexGroupSet = new HashSet(); int index = i; ..

문제 설명https://school.programmers.co.kr/learn/courses/30/lessons/250136   제한 사항   입출력 예   풀이import java.util.HashMap;import java.util.ArrayList;class Solution { private ArrayList checkedLandList = new ArrayList(); public int solution(int[][] land) { HashMap landMap = new HashMap(); int answer = 0; for (int n = 0; n linkedLandList = new ArrayList(); ..