N,R = map(int,input().split())
P = [0]+list(map(int,input().split()))
Q = [0]*(N+1)
for i in range(1,N+1):
    if P[i]==-1:continue
    Q[P[i]] = i
col = [-1]*(N+1)
cnt = 0
for i in range(1,N+1):
    if col[i]>=0:continue
    if P[i]==-1:
        col[i] = cnt
        x = i
        while True:
            y = Q[x]
            if y==0:break
            col[y] = cnt
            x = y
        cnt += 1
for _ in range(R):
    a,b = map(int,input().split())
    if col[a]==col[b]:
        print("Yes")
    else:
        print("No")