原题链接在这里:https://leetcode.com/problems/largest-1-bordered-square/ 题目: Given a 2D grid of 0s and 1s, return the number of elements in the largest square subgrid that has all 1s on its border, or 0 if such a subgrid doesn't exist in the grid. Example 1:…

LeetCode 84. Largest Rectangle in Histogram 单调栈应用 leetcode+ 循环数组,求右边第一个大的数字 求一个数组中右边第一个比他大的数(单调栈 LeetCode--寻找数组中第三大的数…

[LeetCode]Largest Number 解题报告 标签(空格分隔): LeetCode 题目地址:https://leetcode.com/problems/largest-number/#/description 题目描述: Given a list of non negative integers, arrange them such that they form the largest number. For example, given [3, 30, 34, 5, 9], t…

1. Maximal Square 题目链接 题目要求: Given a 2D binary matrix filled with 0's and 1's, find the largest square containing all 1's and return its area. For example, given the following matrix: Return 4. 在GeeksforGeeks有一个解决该问题的方法: 1) Construct a sum matrix S[R…

Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the histogram. Above is a histogram where width of each bar is 1, given height = [2,1,5,6,2,3]. The largest…

Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. For example, Given [3,2,1,5,6,4] and k = 2, return 5. Note: You may assume k is always valid, 1 ≤ k ≤ array'…

在做 Largest Number 这道题之前,我对 sort 方法的用法是非常自信的.我很清楚不传比较因子的排序会根据元素字典序(字符串的UNICODE码位点)来排,如果要根据大小排序,需要传入一个比较函数. 先来看这道题,给你一个数组,让你把数组元素拼接起来,求能拼得的最大的数.如果只有两个数字 a 和 b,如何拼?很明显比较 ab 和 ba 两个数的大小,所以这道题首先需要对数组做一次排序.刷刷写下如下代码: nums.sort(function(a, b) { return (b + '…

原题链接在这里:https://leetcode.com/problems/kth-largest-element-in-an-array/ 题目: Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. For example,Given [3,2,1,5,6,4] a…

题目 Given a list of non negative integers, arrange them such that they form the largest number. For example, given [3, 30, 34, 5, 9], the largest formed number is 9534330. Note: The result may be very large, so you need to return a string instead of a…

# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com'https://oj.leetcode.com/problems/largest-number/ Given a list of non negative integers, arrange them such that they form the largest number. For example, given [3, 30, 34, 5, 9], the largest…

You need to find the largest value in each row of a binary tree. Example: Input: 1 / \ 3 2 / \ \ 5 3 9 Output: [1, 3, 9] 这道题让我们找二叉树每行的最大的结点值,那么实际上最直接的方法就是用层序遍历,然后在每一层中找到最大值,加入结果res中即可,参见代码如下: 解法一: class Solution { public: vector<int> largestValues(T…

问题来源:Largest Rectangle in Histogram 问题描述:给定一个长度为n的直方图,我们可以在直方图高低不同的长方形之间画一个更大的长方形,求该长方形的最大面积.例如,给定下述直方图, 我们可以以高度5宽度2画一个更大的长方形,如下图,该长方形即是面积最大的长方形.该问题是难度比较大的问题,但是很出名,经常作为面试题出现.最近陈利人老师给出该问题的一个O(n)解法,非常巧妙,并从二维三维角度对问题进行了扩展.我们在陈老师的基础上,对该问题进行深入分析,给出多种方法,拓展大…

Design a class to find the kth largest element in a stream. Note that it is the kth largest element in the sorted order, not the kth distinct element. Your KthLargest class will have a constructor which accepts an integer k and an integer array nums,…

题目说明 Given a 2D binary matrix filled with 0's and 1's, find the largest square containing only 1's and return its area. For example, given the following matrix: 1 0 1 0 0 1 0 1 1 1 1 1 1 1 1 1 0 0 1 0 Return 4. 题目分析 我采用的方法比较笨拙,就是对于矩阵中的每一个元素,以反"L"…

原题链接在这里:https://leetcode.com/problems/largest-bst-subtree/ 题目: Given a binary tree, find the largest subtree which is a Binary Search Tree (BST), where largest means subtree with largest number of nodes in it. Note:A subtree must include all of its d…

For example, Given height = [2,1,5,6,2,3], return 10. 解题思路: 参考Problem H: Largest Rectangle in a Histogram第四种思路,或者翻译版Largest Rectangle in Histogram@LeetCode,JAVA实现如下: public int largestRectangleArea(int[] height) { Stack<Integer> stk = new Stack<I…

这两个题几乎是一样的,只是leetcode的题是排成最大的数,剑指的题是排成最小的 179. Largest Number a.需要将数组的数转换成字符串,然后再根据大小排序,这里使用to_string函数将整数转换成字符串,比printf的方式简洁 b.cmp函数必须用static才能使用 c.这题需要排成最大的数,cmp函数如何确定< .>符合呢?cmp中可以默认为a就是两个字符中的第一个,b是第二个,所以a+b>b+a返回true就继续保持这样的排列.如果是<,a+b就会返回…

Given a binary tree, find the largest subtree which is a Binary Search Tree (BST), where largest means subtree with largest number of nodes in it. Note:A subtree must include all of its descendants. Example: Input: [10,5,15,1,8,null,7] 10 / \ 15 / \…

Given a list of non negative integers, arrange them such that they form the largest number. Example 1: Input: [10,2] Output: "210" Example 2: Input: [3,30,34,5,9] Output: "9534330" Note: The result may be very large, so you need to ret…

使用 Java 爬取 LeetCode 题目内容以及提交的AC代码 传送门 Description We have a set of items: the i-th item has value values[i] and label labels[i]. Then, we choose a subset S of these items, such that: |S| <= num_wanted For every label L, the number of items in S with …

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 方法一:完全平方式性质 方法二:暴力求解 方法三:二分查找 方法四:牛顿法 日期 题目地址:https://leetcode.com/problems/valid-perfect-square/description/ 题目描述 Given a positive integer num, write a function which returns…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 回溯法 日期 题目地址:https://leetcode.com/problems/matchsticks-to-square/description/ 题目描述 Remember the story of Little Match Girl? By now, you know exactly what matchsticks the little…

Given a list of non negative integers, arrange them such that they form the largest number. For example, given [3, 30, 34, 5, 9], the largest formed number is 9534330. Note: The result may be very large, so you need to return a string instead of an i…

题目简述: Given a list of non negative integers, arrange them such that they form the largest number. For example, given [3, 30, 34, 5, 9], the largest formed number is 9534330. Note: The result may be very large, so you need to return a string instead o…

Given a list of non negative integers, arrange them such that they form the largest number. For example, given [3, 30, 34, 5, 9], the largest formed number is 9534330. Note: The result may be very large, so you need to return a string instead of an i…

首先上题目 Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the histogram. For example,Given height = [2,1,5,6,2,3],return 10. 题目的大意即给出一个柱状图的歌数据,求柱状图内所包含的最大矩形. 这道…

Given a set of distinct positive integers, find the largest subset such that every pair (Si, Sj) of elements in this subset satisfies: Si % Sj = 0 or Sj % Si = 0. If there are multiple solutions, return any subset is fine. Example 1: nums: [1,2,3] Re…

Given a list of non negative integers, arrange them such that they form the largest number. For example, given [3, 30, 34, 5, 9], the largest formed number is 9534330. Note: The result may be very large, so you need to return a string instead of an i…

Given a list of non negative integers, arrange them such that they form the largest number. For example, given [3, 30, 34, 5, 9], the largest formed number is 9534330. Note: The result may be very large, so you need to return a string instead of an i…

题目描述: Given a positive integer num, write a function which returns True if num is a perfect square else False. 解题分析: 这种找数字的题一般都用类似与二分查找的算法.需要注意的是比较平方和时考虑到integer溢出的情况.所以这个结果是要用Long类型保存.由此到来的改变是判断相等时要用“equals()”方法,而不是“==”. 实现代码: public class Solution…