I don't understand from third problem:

https://code.google.com/codejam/contest/2994486/dashboard#s=p2

The solution to case #1:

3 2
10001
20000
10000

1 2
2 3

is

Case #1: 100002000010001


but according to the explanation of the last case, it is means that

1. Start from 10000 (city 3)
2. Outbound flight to 20000 (city 2)

But I don't see any fligth 3 2

Any cue?

One possible explanation is that the description:


   - Each ticket consists of 2 flights, one from a specific city *X* to
   another specific city*Y* (this is called the *outbound* flight), and the
   other one from city *Y* to city *X* (this is called the *return* flight).
   - You must use the outbound flight before the corresponding return
   flight (you can use other flights in between).


really means:


   - You must use the outbound flight before the corresponding return
   flight (you can use other flights in between) IF YOU USE THE TWO
FLIGHTSbut you can use the return one WITHOUT using the outbound one
   -


I'm not sure, but it is not clear to me.

Angel "Java" Lopez
@ajlopez

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