try add astar in classic_solvers.py; add some functions in utils.py to support NetworkX and GraphML formats #475
| Job | Run time |
|---|---|
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| 2h 14m 17s | |
| 2h 47m 54s | |
| 1h 54m 57s | |
| 11h 53m 18s |
| Job | Run time |
|---|---|
| 2h 33m 0s | |
| 2h 23m 10s | |
| 2h 14m 17s | |
| 2h 47m 54s | |
| 1h 54m 57s | |
| 11h 53m 18s |