tetravex2.in

zju1008测试数据

5
1 1 9 3
2 2 5 4
5 2 8 2
3 5 9 9
3 0 1 7
1 4 3 5
3 1 3 5
8 5 4 2
3 4 1 0
5 3 6 4
9 7 6 4
0 9 3 7
9 3 1 3
9 0 6 2
6 7 4 0
0 7 0 8
9 7 9 1
4 9 0 3
0 4 9 7
6 2 2 3
8 2 2 9
7 4 3 2
0 3 0 3
4 3 4 1
6 5 0 1