50 10 10000 10000 10000 4 4 1 4 0 0 4 1 2 3 3 4 4 4 3 3 0 1 2 2 3 3 3 4 2 3 2 3 2 4 2 0 3 0 2 0 0 4 1 4 2 4 2 4 0 10000 10000