G - Beautiful People Time Limit: 10000/5000MS (Java/Others) Memory Limit: 128000/64000KB (Java/Others)     Special Judge SubmitStatus Problem Description The most prestigious sports club in one city has exactly N members. Each of its members is stron…

  Description A numeric sequence of ai is ordered if a1 < a2 < ... < aN. Let the subsequence of the given numeric sequence (a1, a2, ..., aN) be any sequence (ai1, ai2, ..., aiK), where 1 <= i1 < i2 < ... < iK <= N. For example, seq…

Given a binary tree, find the length of the longest consecutive sequence path. The path refers to any sequence of nodes from some starting node to any node in the tree along the parent-child connections. The longest consecutive path need to be from p…

Given an unsorted array of integers, find the length of the longest consecutive elements sequence. For example, Given [100, 4, 200, 1, 3, 2], The longest consecutive elements sequence is [1, 2, 3, 4]. Return its length: 4. Your algorithm should run i…

最长连续序列 给定一个未排序的整数数组,找出最长连续序列的长度. 说明 要求你的算法复杂度为O(n) 样例 给出数组[100, 4, 200, 1, 3, 2],这个最长的连续序列是 [1, 2, 3, 4],返回所求长度 4 解题 排序后比较简单,快排O(nlogn) 后面只需要O(n)的时间复杂度求解了 发现原数组里面有重复数字的时候,下面方法行不通了. public class Solution { /** * @param nums: A list of integers * @retu…

题意:给出m个字符串,找出其中的最长公共子序列,如果相同长度的有多个,输出按字母排序中的第一个. 思路:数据小,因此枚举第一个字符串的所有子字符串s,再一个个比较,是否为其它字符串的字串.判断是否为字串的时候,将s的字符依次与其他字符串的字符比较. #include <iostream> #include <stdio.h> #include <string.h> #include <stack> #include <algorithm> usi…

转载请注明来自souldak,微博:@evagle 题目(来自leetcode): 给你一个n个数的乱序序列,O(N)找出其中最长的连续序列的长度. 例如给你[100, 4, 200, 1, 3, 2],那么最长的连续序列为[1, 2, 3, 4],所以返回4. 思路: 最简单直接的想法是:将数组排序,然后扫一遍排好序的序列,从中找出最长的即可,这样的话时间是O(nlogn)+O(n),显然不符合题目要求,会超时. 那怎么样不排序就能做出来呢? 我们先抛开算法,想想自己会怎么找,当数组很小,你可…

题目的意思是给定k个盒子,每个盒子的维度有n dimension 问最多有多少个盒子能够依次嵌套 但是这个嵌套的规则有点特殊,两个盒子,D = (d1,d2,...dn) ,E = (e1,e2...en) 只要盒子D的任意全排列,小于盒子E,那么就说明 盒子D能放入盒子E中,其实就是将两个盒子的维度排序,如果前一个盒子的维度依次小于后一个盒子,那么就说明前一个盒子能放入后一个盒子中 这个题目能够转化为最长递增子序列. 首先将盒子的维度从小到大排序,然后将k个盒子,按照排序后的第一维度从小到大排…

Given an unsorted array of integers, find the number of longest increasing subsequence. Example 1: Input: [1,3,5,4,7] Output: 2 Explanation: The two longest increasing subsequence are [1, 3, 4, 7] and [1, 3, 5, 7]. Example 2: Input: [2,2,2,2,2] Outpu…

Given a binary tree, you need to find the length of Longest Consecutive Path in Binary Tree. Especially, this path can be either increasing or decreasing. For example, [1,2,3,4] and [4,3,2,1] are both considered valid, but the path [1,2,4,3] is not v…