Longest Consecutive Sequence 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 in O(n) ...
代码如下: 1 int longestConsecutive(vector<int>& num) { 2 if(num.size() == 0) 3 return 0; 4 set<int> st(num.begin(),num.end()); 5 int count = 1; 6 for(int i = 0;i < num.size();i++) 7 { 8 int temp = num[i]; 9 if(st.count(temp) == 0) 10 continue; 11 ...
LeetCode128. Longest Consecutive Sequence 记不得曾经 Given an unsorted array of integers nums, return the length of the longest consecutive elements sequence. You must write an algorithm that runs in O(n) time. Example 1: [1, 2, 3, 4] Example 2: Input: nums = [0,3,7,2,5,8,4...
力扣.53 最大子数组和 maximum-subarray 力扣.128 最长连续序列 longest-consecutive-sequence 力扣.1 两数之和 N 种解法 two-sum 力扣.167 两数之和 II two-sum-ii 力扣.170 两数之和 III two-sum-iii 力扣.653 两数之和 IV two-sum-IV 力扣.015 三数之和 three-sum 题目 给定一个未排序的整数数...
[LeetCode]Longest Consecutive Sequence 题目大意 给定一个整形数组,求出最长的连续序列。例如数组[100,4,200,1,3,2],最长的连续序列长度为[1,2,3,4],长度为4。要求时间复杂度为O(n)。 思路 "排序转换成经典的动态规划问题"的话排序至少需要时间复杂度为O(nlog(n))——pass...
https://leetcode.com/problems/longest-consecutive-sequence/ 思路很简单。 http://chaoren.is-programmer.com/posts/42924.html code class Solution(object): def longestConsecutive(self, num): """ :type nums: List[int] :rtype: int """
1 对于nums中的每一个num,如果num-1存在,且长度是left,num+1存在,且长度是right,则新的长度就是left+right+1;通过dic.get函数,如...
classSolution{public:intlongestConsecutive(vector<int>&num){unordered_set<int>record(num.begin(),num.end());intres=0;for(intn:num){if(record.find(n)==record.end())continue;record.erase(n);intprev=n-1,next=n+1;while(record.find(prev)!=record.end())record.erase(prev--);while(record...
47 thoughts on “LeetCode – Longest Consecutive Sequence (Java)” alexwest11 June 19, 2022 at 6:34 am could we just put all into hash, and for each element check if NOT exist (-1) so, it is start of new consec seq and check all next elements: +1 +2 …?
Longest Consecutive Sequence @ LeetCode (Python)kitt posted @ 2014年2月19日 01:30 in LeetCode , 2728 阅读 用dictionary, get item的平均时间复杂度为O(1), 可以把key设为list中的数, value用于标记是否访问过。遍历所有的key, 不断找寻其+1和-1得到的值是否在dictionary中, 记下最长的连续序列长度...