public static void main(String[] args) { Scanner sc = new Scanner(System.in); while (true) { System.out.println("please input a positive integer: "); int n = sc.nextInt(); getSubInteger(n); System.out.println("========================="
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(