N, Q = map(int, input().split())
A = list(map(int, input().split()))

q = [0] * Q
for i in range(Q):
	q[i] = list(map(int, input().split()))
	
back = [-1] * N

for i in range(N):
	if A[i] != -1:
		back[A[i]-1] = i

p = [-1] * N
for i in range(N):
	if A[i] == -1:
		t = i
		while t != -1:
			p[t] = i
			t = back[t]

for i in range(Q):
	u, v = q[i]
	if p[u-1] == p[v-1]:
		print("Yes")
	else:
		print("No")