#样例1:

10 10
3 0 2 0
10 1 9 0
2 1 4 0
10 1 2 1
2 1 2 0
10 1 9 1
2 1 4 0
10 0 9 1
1 1 8 1
8 0 2 1

我的输出: 0 0 1 1 0 0 0 1 0 0

WA：Wrong Answer.wrong answer Wrong in No.3 clause , input is {2,1,4,0} , your xval is 0 , yval is 1

为什么啊，选择2的0和4的1不行吗