摘要： package leetcode; public class Tree { private Integer[] treeArr; private int treeDep; private int wordLen = 1; private int gap = 3; // gap >= 3 public 阅读全文

摘要： public class ListNode { public int val; public ListNode next; public ListNode() {} public ListNode(int val) { this.val = val; } public ListNode(int va 阅读全文