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题解 | #寻找第K大#

import java.util.*; public class Solution { public int findKth(int[] a, int n, int k) { PriorityQueue<Integer> queue = new Priority...

Java

2022-04-25

0 281

题解 | #寻找第K大#

import java.util.*; /** 快速排序思路,每次找一个值,确定这个值在最终排序数组中的最终位置! **/ public class Solution { // 直接排序也能达到时间复杂度O(nlogn) public int findKth(int[] arr,...

2022-04-25

0 325

题解 | #滑动窗口的最大值#

import java.util.*; public class Solution { public ArrayList<Integer> maxInWindows(int [] num, int size) { ArrayList<Integer> ...

Java

2022-04-25

0 289

题解 | #有效括号序列#

import java.util.*; public class Solution { /** * * @param s string字符串 * @return bool布尔型 */ public boolean isValid (St...

Java

2022-04-25

0 310

题解 | #包含min函数的栈#

import java.util.*; public class Solution { Deque<Integer> stack = new LinkedList<>(); Deque<Integer> min = new LinkedList&...

Java

2022-04-25

0 204

题解 | #用两个栈实现队列#

import java.util.Stack; public class Solution { Stack<Integer> stack1 = new Stack<Integer>(); Stack<Integer> stack2 = new S...

Java

2022-04-25

0 181

题解 | #输出二叉树的右视图#

import java.util.*; public class Solution { private Map<Integer,Integer> indexs = new HashMap<>(); private int i = 0; public...

Java

2022-04-23

0 293

题解 | #重建二叉树#

import java.util.*; /** * Definition for binary tree * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * T...

Java

2022-04-23

0 299

题解 | #序列化二叉树#

/* public class TreeNode { int val = 0; TreeNode left = null; TreeNode right = null; public TreeNode(int val) { this.val = va...

Java

2022-04-23

0 326

题解 | #在二叉树中找到两个节点的最近公共祖先#

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

Java

2022-04-23

0 287