919 B | 919 chars
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
BLANK = " "
inp = input
# inp = lambda : sys.stdin.readline()[:-1].strip()
mii = lambda x = BLANK : [*map(int,inp().split(x))]
mfi = lambda x = BLANK : [*map(float,inp().split(x))]
ii = lambda : int(inp())
fi = lambda : float(inp())
p = print
def solve():
while 1:
try:
n = ii()
a = mii()
b = mii()
except:
break
A = [0] * n
B = [0] * n
for i in range(n):
A[a[i] - 1] = i
B[b[i] - 1] = i
cnt = 0
for i in range(n):
for j in range(i + 1, n):
x = (A[i], B[i])
y = (A[j], B[j])
if x[0] < y[0] and x[1] > y[1]:
cnt += 1
elif x[0] > y[0] and x[1] < y[1]:
cnt += 1
p(cnt)
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()