摘要:
暴力法: class Solution { public int majorityElement(int[] nums) { //最容易想到暴力法 int n = nums.length; if(n==1) return nums[0]; Map<Integer,Integer> map = new 阅读全文
posted @ 2020-08-20 16:06
欣姐姐
阅读(116)
评论(0)
推荐(0)
摘要:
public String[] permutation(String s) { //显然是递归加回溯 char[] c = s.toCharArray(); int n = c.length; //可能有重复元素,所以用set来存储, Set<String> set = new HashSet<>( 阅读全文
posted @ 2020-08-20 14:55
欣姐姐
阅读(95)
评论(0)
推荐(0)
摘要:
class Solution { Node pre, head; public Node treeToDoublyList(Node root) { if(root == null) return null; dfs(root); head.left = pre; pre.right = head; 阅读全文
posted @ 2020-08-20 10:02
欣姐姐
阅读(94)
评论(0)
推荐(0)
摘要:
// Encodes a tree to a single string. public String serialize(TreeNode root) { if(root == null) return "[]"; Deque<TreeNode> deque = new LinkedList<>( 阅读全文
posted @ 2020-08-20 10:01
欣姐姐
阅读(118)
评论(0)
推荐(0)

浙公网安备 33010602011771号