现在的代码（3TLE)

import java.util.Scanner;

public class Main 
{
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int n,m;
        String b = input.nextLine();
        n = Integer.parseInt(b.substring(0, b.indexOf(' ')));
        m = Integer.parseInt(b.substring(b.indexOf(' ') + 1, b.length()));
        int [] arr = new int[n];
        int len = 0;
        String a = input.nextLine();
        String[] strarr = a.split(" ");
        for(int i = 0; i < n; i++)
        {
        	arr[i] = Integer.parseInt(strarr[i]);
        }
    }
}

常规写法就不展示了（全TLE） 注意：是内存爆掉了，快读可能没用