| In a directed graph with 5 nodes numbered from 0 to 4: | |
| node 1 should be visited before node 0 | |
| node 2 should be visited before node 4. |
| In a directed graph with 5 nodes numbered from 0 to 4: | |
| node 1 should be visited before node 0 | |
| node 2 should be visited before node 4. |