You are working for Macrohard company in data structures department. After failing your previous task about key insertion you were asked to write a new data structure that would be able to return quickly k-th order statistics in the array segment. Th…
题目描述 You are working for Macrohard company in data structures department. After failing your previous task about key insertion you were asked to write a new data structure that would be able to return quickly k-th order statistics in the array segmen…
[POJ2104][HDU2665]K-th Number Description You are working for Macrohard company in data structures department. After failing your previous task about key insertion you were asked to write a new data structure that would be able to return quickly k-th…
Description You are working for Macrohard company in data structures department. After failing your previous task about key insertion you were asked to write a new data structure that would be able to return quickly k-th order statistics in the array…
题意:给定一个长为n的序列,有m次强制在线的询问,每次询问位置[L,R]中abs(a[i]-p)第k小的值 n,m<=1e5,a[i]<=1e6,p<=1e6,k<=169 思路:主席树外面套个二分 #include<bits/stdc++.h> using namespace std; typedef long long ll; typedef unsigned int uint; typedef unsigned long long ull; typedef pai…
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. 思路: 堆.讲解:二叉堆 class Solution { public: //新插入i结点 其父节点为(i…
题目: Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Note: You may assume k is always valid, 1 ≤ k ≤ BST's total elements. 思路: 1.计算左子树元素个数leftSize. 2. leftSize+1 = K,则根节点即为第K个元素 leftSize >=k, 则第K个元素在左子树…
题目two num 题意:给定一个整数数组和一个目标值.要求在数组中找到两个数.使得它们的和相加等于目标值.而且返回两个数的下标 思路:1.假设使用暴力,时间复杂度为O(n^2) 2.能够先将全部数进行排序,从最大值和最小值開始匹配再依据和目标值的比較移动,知道找到结果.时间复杂度为O(nlog(n)) 知识点:comparable 接口的使用.利用其进行对象的自然排序.相关文章 public class Solution { static class Node implements Compa…
Description Alice有 n(n≤26) 张牌,牌上分别标有前 n 个英文小写字母.例如,如果 n=3 ,则Alice有3张牌,分别标有"a", "b", "c" .Alice可以通过排列这些卡牌来构造字符串 t .考虑字符串 t 的所有子串(共 n(n+1)2 个),按照字典序从小到大排名第 k 的子串为 s .现在,给你正整数 n,k 和字符串 s ,问有多少种可能的字符串 t .将答案对 109+7 取模. 例如: 当 n=3,…
链接:https://leetcode.com/tag/heap/ [23] Merge k Sorted Lists [215] Kth Largest Element in an Array (无序数组中最小/大的K个数)(2018年11月30日第一次复习) 给了一个无序数组,可能有重复数字,找到第 k 个最大的元素并且返回这个元素值. 题解:直接用直接用个堆保存数组中最大的 K 个数.时间复杂度是 O(NlogK). //时间复杂度是 O(NlogK), 用堆辅助. class Solut…
[4]Median of Two Sorted Arrays [29]Divide Two Integers [33]Search in Rotated Sorted Array [34]Find First and Last Position of Element in Sorted Array [35]Search Insert Position [50]Pow(x, n) [69]Sqrt(x) [74]Search a 2D Matrix (2019年1月25日,谷歌tag复习)剑指of…
[94]Binary Tree Inorder Traversal [95]Unique Binary Search Trees II (2018年11月14日,算法群) 给了一个 n,返回结点是 1 - n 的所有形态的BST. 题解:枚举每个根节点 r, 然后递归的生成左右子树的所有集合,然后做笛卡尔积. /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * Tr…
链接:https://leetcode.com/tag/divide-and-conquer/ [4]Median of Two Sorted Arrays [23]Merge k Sorted Lists [53]Maximum Subarray (2019年1月23日, 谷歌tag复习) 最大子段和. 题解: follow up 是divide and conquer If you have figured out the O(n) solution, try coding another…
Description Newman likes playing with cats. He possesses lots of cats in his home. Because the number of cats is really huge, Newman wants to group some of the cats. To do that, he first offers a number to each of the cat (1, 2, 3, …, n). Then he occ…
time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output You are given two integers n and k. Find k-th smallest divisor of n, or report that it doesn't exist. Divisor of n is any such natural number, t…
Time Limit: 10 second Memory Limit: 2 MB 问题描述 新年到了,突然间,就在那美丽的一霎那,你好友和你(K个人)的周围满是礼物,你发扬你帅气的风格,让你的好友先拿,但是每个人只能拿当前离自己最近的礼物[当然如果有并列的多个礼物离你的距离相等(精确到小数后四位,所有运算均为去尾),这些礼物就都属于这个人].现在你们所在的位置是原点(0,0),每个礼物的位置用坐标表示.现在告诉你每个礼物的坐标,还有每个礼物是谁送的.要你找出你的礼物离你多远,你能拿到多少礼物,这…
Difficulty: Medium More:[目录]LeetCode Java实现 Description https://leetcode.com/problems/kth-smallest-element-in-a-bst/ Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Note: You may assume k is always va…
[LeetCode]779. K-th Symbol in Grammar 解题报告(Python) 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/k-th-symbol-in-grammar/description/ 题目描述: On the first row, we write a 0. Now in every subsequent row, we lo…
[LeetCode]378. Kth Smallest Element in a Sorted Matrix 解题报告(Python) 标签: LeetCode 题目地址:https://leetcode.com/problems/kth-smallest-element-in-a-sorted-matrix/description/ 题目描述: Given a n x n matrix where each of the rows and columns are sorted in ascen…
