薯条和番茄酱

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题解 | #判断一个链表是否为回文结构#

import java.util.*; public class Solution { public boolean isPail (ListNode head) { ArrayList<Integer> nums = new ArrayList(); ...

2023-07-19

0 285

题解 | #跳台阶#

import java.util.*; public class Solution { /** * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可 * * * @param number int整型 * @r...

2023-07-17

0 257

题解 | #表达式求值#

import java.util.*; public class Solution { public int solve (String s) { Map<Character,Integer> map = new HashMap<>();...

2023-07-17

0 310

题解 | #包含min函数的栈#

import java.util.*; import java.util.Stack; public class Solution { Stack<Integer> stack = new Stack<>(); // 栈用于记录较小的元素 Sta...

2023-07-16

0 339

题解 | #判断是不是平衡二叉树#

import java.util.*; /* * public class TreeNode { * int val = 0; * TreeNode left = null; * TreeNode right = null; * public TreeNode(int v...

2023-07-15

0 322

题解 | #二叉树的镜像#

import java.util.*; /* * public class TreeNode { * int val = 0; * TreeNode left = null; * TreeNode right = null; * public TreeNode(int v...

2023-07-15

0 255

题解 | #合并二叉树#

import java.util.*; /* * public class TreeNode { * int val = 0; * TreeNode left = null; * TreeNode right = null; * public TreeNode(int v...

2023-07-15

0 289

题解 | #二叉树中和为某一值的路径(一)#

import java.util.*; public class Solution { public boolean hasPathSum (TreeNode root, int sum) { // write code here //前序遍历...

2023-07-11

0 270

题解 | #按之字形顺序打印二叉树#

import java.util.*; public class Solution { /** * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可 * * * @param pRoot TreeNode类 ...

2023-07-11

0 299

题解 | #求二叉树的层序遍历#

import java.util.*; public class Solution { public ArrayList<ArrayList<Integer>> levelOrder (TreeNode root) { // write ...

2023-07-11

0 390