klao@922: c LEMON max flow problem
marci@867: p max 7 9
marci@867: n 1 s
marci@867: n 7 t
marci@867: a 1 2 3
marci@867: a 1 3 2
marci@867: a 1 4 1
marci@867: a 2 5 3
marci@867: a 3 5 2
marci@867: a 3 7 5
marci@867: a 3 6 3
marci@867: a 4 6 1
marci@867: a 5 7 2
marci@867: a 6 7 4