[LeetCode 128] - 最長連續序列(Longest Consecutive Sequence)
問題 給出一個未排序的整數數組，找出最長的連續元素序列的長度。 如： 給出[100, 4, 200, 1, 3, 2]， 最長的連續元素序列是[1, 2, 3, 4]。返回它的長度：4。 你的算法必須有O(n)的時間復雜度。 初始思路 要找連續的元素，第一反應一般是先把數組排序 ...
原文：[LeetCode] Longest Consecutive Sequence 求最長連續序列
Given an unsorted array of integers, find the length of the longest consecutive elements sequence. Your algorithm should run in O n complexity. Example: 這道題要求求最長連續序列，並給定了O n 復雜度限制，我們的思路是，使用一個集合HashSe ...
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原題地址：https://oj.leetcode.com/problems/longest-consecutive-sequence/ 題意： Given an unsorted array of integers, find ...