cook your dish here
t=int(input())
for j in range(t):
n,m=map(int,input().split())
w=list(map(int,input().split(" “)))
c=list(map(int,input().split(” ")))
ans=[]
ans.append(c[n-1])
bm=w[n-1]
for i in range(n-1,-1,-1):
if(w[i]>bm):
ans.append(c[i])
bm=w[i]
print(len(list(set(ans))))