1# 0 <= i <= P
2# 0 <= j <= 2i+Q
3# 0 <= k <= i-P+R
4# 0 <= P,Q,R
5#----------------
6
7#  i  j  k   P  Q  R  cte
86 8
91  1  0  0   0  0  0   0	# i >= 0
101 -1  0  0   1  0  0   0	# i <= P
111  0  1  0   0  0  0   0	# j >= 0
121  2 -1  0   0  1  0   0	# j <= 2i+Q
131  0  0  1   0  0  0   0	# k >= 0
141  1  0 -1  -1  0  1   0	# k <= i-P+R
15
163 5
171 1 0 0 0
181 0 1 0 0
191 0 0 1 0
20