网易笔试（排序整除4）本地可以通过举例 提交却0%

import java.util.Scanner;

public class Main{
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		while(in.hasNext()){
			String res = "";
			int groupNum = in.nextInt();
			while(groupNum>0){
				int len = in.nextInt();
				int[] buf = new int[len];
				int j=0;
				while(j<len){
					buf[j++] = in.nextInt();
				}
				res += isLegal(buf) + "@";
				groupNum--;
			}
			String reString = res.substring(0, res.length()-1);
			System.out.print(reString.replaceAll("@", "\n"));
		}
	}
	
	private static String isLegal(int[] buf){
		int len = buf.length;
		boolean[] flags = new boolean[len];
		boolean flag = false;
		int cur = 0;
		for(int i=0; i<len-1; i++){
			flag = false;
			flags[cur] = true;
			for(int j=0; j<len; j++){
				if ((buf[j] * buf[cur] % 4 ==0) && (!flags[j])) {
					cur = j;
					flag = true;
					break;
				}
			}
			if (!flag) {
				return "No";
			}
		}
		return "Yes";
	}
}