# Haghighat and Polychronopoulos example
# 0 <= i <= N
# 3 <= j <= i
# j <= k <= 5
#------------
6 6
1  1  0  0  0  0
1 -1  0  0  1  0
1  0  1  0  0 -3
1  1 -1  0  0  0
1  0 -1  1  0  0
1  0  0 -1  0  5

1 3
1 1 0 

N
Haghighat and Polychronopoulos first example
