inside-outside algorithm written by c++
inside alpha:
(0, 0) -2 0.10000
(0, 1) -2 0.00400
(0, 2) -2 0.00032
(1, 1) -2 0.10000
(1, 2) -2 0.00400
(2, 2) -2 0.10000
(0, 0) -1 0.10000
(0, 1) -1 0.00400
(0, 2) -1 0.00032
(1, 1) -1 0.10000
(1, 2) -1 0.00400
(2, 2) -1 0.10000