Given a n x n matrix where each of the rows and columns are sorted in ascending order, find the kth smallest element in the matrix. Note that it is the kth smallest element in the sorted order, not the kth distinct element. Example: matrix = [ [ 1, 5
2.2 Implement an algorithm to find the kth to last element of a singly linked list. 这道题让我们求链表中倒数第k个元素,LeetCode中相类似的题目有Kth Largest Element in an Array 数组中第k大的数字 和 Kth Smallest Element in a BST 二叉搜索树中的第K小的元素.但那两道题和这题又不一样,首先这道题是要在链表中操作,链表的特点就是不能通过下标来直接访
问题来源:http://www.careercup.com/question?id=6335704 问题描述: Given a N*N Matrix. All rows are sorted, and all columns are sorted. Find the Kth Largest element of the matrix. 解答: 先给出算法的时空复杂度,时间O(k * lg k),空间O(k). 算法:为了方便描述不防假设矩阵左上角的元素最小,且k<=n. 1. 取每行行首元素建
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: Given two integers n and k, return all possible combinations of k numbers out of 1 ... n. 解析:同求全部组合的过程一样,只是这里限制每个组合中元素的个数为k,求所有组合时并不限制元素个数. 若要排除重复的元素,则首先对所有元素进行排序. 代码: public static List<List<Integer>> getAllCombinations(int[] array,int k)
问题:两个已经排好序的数组,找出两个数组合并后的中位数(如果两个数组的元素数目是偶数,返回上中位数). 设两个数组分别是vec1和vec2,元素数目分别是n1.n2. 算法1:最简单的办法就是把两个数组合并.排序,然后返回中位数即可,由于两个数组原本是有序的,因此可以用归并排序中的merge步骤合并两个数组.由于我们只需要返回中位数,因此并不需要真的合并两个数组,只需要模拟合并两个数组:每次选数组中较小的数,统计到第(n1+n2+1)/2个元素就是要找的中位数.算法复杂度为O(n1+n2) in
题目大意 https://leetcode.com/problems/kth-smallest-element-in-a-bst/description/ 230. 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 valid,
题目描述: Given an array of integers and an integer k, find out whether there are two distinct indices i and j in the array such that nums[i] = nums[j] and the absolute difference between i and j is at most k. Example 1: Input: [1,2,3,1], k = 3 Output: t
设计一个找到数据流中第 K 大元素的类(class).注意是排序后的第 K 大元素,不是第 K 个不同的元素. 你的 KthLargest 类需要一个同时接收整数 k 和整数数组 nums 的构造器,它包含数据流中的初始元素.每次调用 KthLargest.add,返回当前数据流中第 K 大的元素. 示例: int k = 3; int[] arr = [4,5,8,2]; KthLargest kthLargest = new KthLargest(3, arr); kthLargest.ad