标签:leetcode
https://oj.leetcode.com/problems/subsets-ii/
http://blog.csdn.net/linhuanmars/article/details/24613193
public class Solution { public List<List<Integer>> subsetsWithDup(int[] num) { Arrays.sort(num); Set<List<Integer>> results = new HashSet<>(); help(num, 0, new ArrayList<Integer>(), results); return new ArrayList<List<Integer>>(results); } // Don‘t know how to handle duplicate cases :( // Using set private void help(int[] n, int start, List<Integer> items, Set<List<Integer>> results) { results.add(new ArrayList<Integer>(items)); for (int i = start ; i < n.length ; i ++) { items.add(n[i]); help(n, i + 1, items, results); items.remove(items.size() - 1); } } }
标签:leetcode
原文地址:http://7371901.blog.51cto.com/7361901/1599096