#P4988. Little Pony and Boast Busters
Little Pony and Boast Busters
Problem Description
"I hereby challenge you, Ponyvillians: anything you can do, I can do better. Any takers? Anyone? Or is Trixie destined to be the greatest equine who has ever lived!?!" — "Boast Busters"
Given two permutation P0 && P1 of {0, 1, ..., n - 1}, we define the crossing number of it as follows. Write P0 from left to right above P1 and draw a straight line between each same elements. The crossing number of P0 and P1 is the number of pairs of lines that cross.
For example, if n = 5, and P0 = {0, 1, 2, 3, 4}, and P1 = {1, 3, 0, 2, 4}, then the crossing number of P0 and P1 is 3, as shown in the figure below.

Now given you the two permutation, you need to implement the following operations:
SWAP p a b: swap Pp[a] and Pp[b] (0<=p<=1, 0<=a, b<=n-1).
QUERY: ask the crossing number of the current P0 and P1.
Input
Input contains multiple test cases (less than 10). For each test case, the first line contains one integer n (1<=n<=10^5).
The second line contains n integers P0[0], P0[1], ..., P0[n-1].
The third line contains n integers P1[0], P1[1], ..., P1[n-1].
The next line contains one integer q —— the number of operations (1<=q<=10^5). The next q line, each line will contains a operation as we mentioned above.
Output
For each query, output the corresponding result in one line.
5
0 1 2 3 4
1 3 0 2 4
5
QUERY
SWAP 1 2 4
QUERY
SWAP 0 2 4
QUERY
3
6
5