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题解 | #斐波那契数列#

public class Solution { public int Fibonacci(int n) { if (n <= 2) { return 1; } int f1 = 1, f2 = 1, f3 = 2;...

Java 动态规划

2022-03-20

1 218

题解 | #二叉树的最大深度#

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

Java 二叉树栈递归动态规划

2022-03-20

0 253

题解 | #按之字形顺序打印二叉树#

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

Java 二叉树队列 Java 队列二叉树

2022-03-20

2 291

题解 | #求二叉树的层序遍历#

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

Java 队列

2022-03-20

0 298

题解 | #二叉树的后序遍历#

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

Java 递归

2022-03-20

0 300

题解 | #二叉树的中序遍历#

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

Java 递归

2022-03-20

1 336

题解 | #二叉树的前序遍历#

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

Java 递归

2022-03-20

1 298

题解 | #合并两个有序的数组#

解法一： import java.util.*; public class Solution { public void merge(int A[], int m, int B[], int n) { int i = 0,j = 0,k = 0;//定义指针 ...

Java 双指针

2022-03-20

0 280

题解 | #岛屿数量#

import java.util.*; public class Solution { /** m,n表示坐标,把与m和n相邻的1 都置为 0 */ static void dfs(char[][] grid, int m, int n) { i...

Java 深度优先搜索

2022-03-19

1 404

题解 | #蛇形矩阵#

import java.util.Scanner; public class Main { static void printArr(int a[][]){ for (int i = 0; i < a.length; i++) { for (...

Java 数组

2022-03-05

0 250