12
node 3, 5.5, 10.3, 13.0
node 9, 7.3, 12.2, 20.0
node 5, 22.0, 44.0, 17.0
node 7, 25.0, 43.0, 21.0
node 4, 234.0, 237.0, 19.0
bcst from 3
bcst from 9
bcst from 7
bcst from 4