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


train_line = [0] * N

line_num = 1
for i in range(N):
    if P[i] == -1:
        train_line[i] = line_num
        line_num += 1

for i in range(N):
    if P[i] != -1:
        train_line[i] = train_line[P[i]-1]
for _ in range(Q):
    A, B = map(int, input().split())
    if train_line[A-1] == train_line[B-1]:
        print("Yes")
    else:
        print("No")