Okay... I mis-understood the definition of the `lexicographically smaller`

.

```
Path Pa1, Pa2, ..., Pan is lexicographically smaller than Pb1, Pb2, ..., Pbm, if and only if at the first i where Pai and Pbi differ, Pai < Pbi; when no such i exists, then n < m.
```

Can someone help me delete this post? Thanks