10
0 0 1 -1 0
0 0 -1 1 0
0 0 1 0 -3
0 0 0 1 3
3 5 7 9 11
5 4 8 54 12
34 45 65 76 789
1234 3445 4365 4576 4789
-1234 3445 -4365 4576 -4789
-1 -5 365 4576 -4789