I,R=input,range
def S(n):
	return int(n)-1
def J():
	return map(S,I().split())
N=int(I())
p=[i for i in R(N)]
def r(i):
	m=p[i]
	while i!=m:
		p[i]=i=p[m]
		m=p[i]
	return i
E,L=[set() for i in R(N)],[0]*N
for i in R(1,N):
	L[i],A=J()
	E[A].add(i)
	p[r(i)]=r(A)
n={0}
while len(n):
	i=n.pop()
	for e in E[i]:L[e]=max(L[e],L[i])
	n|=E[i]
Q=int(I())
t,y,X=[0]*Q,[0]*Q,set()
for i in R(Q):
	t[i],y[i]=J()
	X.add(y[i])
D,d,m,e={},0,[{0},set()],0
for x in sorted(X):
	n=m[e]
	while len(n):
		i=n.pop()
		if L[i]>x:m[1-e].add(i)
		else:d,n=d+1,n|E[i]
	D[x],e=d,1-e
for i in R(Q):print([-1,L[y[i]]+1][r(y[i])<1] if t[i] else D[y[i]])