Nodes with dead power supplies

[[1,12],[1,14]]

Nodes with issues

[[1,6],[1,7],[1,9],[1,13]][

[[16,6]]

[[14,12],[14,13],[14,14]]

Working nodes

[[1,10],[],[]]


[[4,10],[],[]]
[[5,16],[]]

[[7,10],[],[]]


[[10,11],[10,18]]

[[12,1],[]]
[[13,8],[13,10],[13,20]]
[[14,10],[14,15],[]]
[[15,9],[]]


[[18,18],[]]
[[19,2],[]]