Hi, i'm trying to solve a cool problem but can't figure out how we can do it.

What is the minimum number of $$$moves$$$ to get from $$$x$$$ to $$$z$$$.

Input :

N

X, Y

pairs...

Eg :

5

1 3

1 2

2 4

2 5

5 6

6 3

ANS = 5 : 1,2 — 2,4 — 2,5 — 5,6 — 6,3