holiday/8.10/ce2.cpp

6
1 1 3 3
0 0 2 3

0 5 7 0
0 0 1 4

0 2  2 2
2 3 0 9

2 3 1 4
0 0 2 2

2 3 2 4
0 2 2 0

3 2 3 4
2 2 0 0