1# Pugh's more elaborate example
2# 1 <= i
3# j <= n
4# 2i <= 3j
5#--------------
6
73 5
81 1 0 0 -1
91 0 -1 1 0
101 -2 3 0 0
11
121 3
131 1 -1
14
15n
16Pugh's example
17