h3. Explicaţie
Excursiile care au costul egal cu 1 sunt:

1. 3 -> 5
2. 5 -> 6
3. 4 -> 6
4. 1 -> 3 -> 5
5. 2 -> 3 -> 5
6. 3 -> 5 -> 6
7. 3 -> 4 -> 6
8. 7 -> 5 -> 6
9. 1 -> 3 -> 4 -> 6
10. 1 -> 3 -> 5 -> 6
11. 2 -> 3 -> 5 -> 6
12. 2 -> 3 -> 4 -> 6

1) 3 -> 5
2) 5 -> 6
3) 4 -> 6
4) 1 -> 3 -> 5
5) 2 -> 3 -> 5
6) 3 -> 5 -> 6
7) 3 -> 4 -> 6
8) 7 -> 5 -> 6
9) 1 -> 3 -> 4 -> 6
10) 1 -> 3 -> 5 -> 6
11) 2 -> 3 -> 5 -> 6
12) 2 -> 3 -> 4 -> 6

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