Java多行输入，行数未知

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main9 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scanner = new Scanner(System.in);
		List<String> list = new ArrayList<String>();
		String s;
		while(true){
			if((s = scanner.nextLine()).equals("")){
				break;
			}
			list.add(s);
		}
		for(int i = 0; i < list.size(); i++){
			String string = list.get(i);
			String temp[] = string.split(" ");
			int res[] = new int[temp.length];
			for(int j = 0; j < temp.length; j++){
				res[j] = Integer.parseInt(temp[j]);
			}
			System.out.print(isequ(res) + " ");
		}
	}
	
	public static boolean isequ(int a[]) {
		
		if(a[0] >= 10 && a[a.length - 1] >= 10){
			for(int i = 1; i < a.length - 1; i++){
				if(a[i] >= 10){
					return false;
				}
			}
		}else if (a[0] < 10 && a[a.length - 1] < 10) {
			for(int i = 1; i < a.length - 1; i++){
				if(a[i] < 10){
					return false;
				}
			}
		}else {
			for(int i = 0; i < a.length; i++){
				if(i % 2 == 0 && a[i] >= 10){
					return false;
				}else if(i % 2 == 1 && a[i] < 10){
					return false;
				}
			}
		}
		return true;
	}
}