
4 5
1 -1 -1 2 -4 # x+y < 2n -3   ==  -x -y +2n -3 > 0
1 2 3 0 -2 # 2x + 3y > 1
1 1 0 0 -1 # x > 0
1 0 -1 0 4 # y < 5

0 3

