n=int(input())
c=[tuple(map(int,input().split())) for i in range(n)]
m=[n]*n
for i in reversed(range(n)):
  a,b=c[i]
  if b==1:
    m[i]=i
  if i+1<n:
    m[i]=min(m[i],m[i+1])
re=[-1]*n
i=0
while i<n:
  a,b=c[i]
  if a==1:
    re[i+1]=i
    i+=1
  elif b==2:
    re[m[i]]=i
    i+=1
  else:
    print(i+1)
    if re[i]!=-1:
      ii=re[i]
      while ii!=-1:
        print(ii+1)
        ii=re[ii]
    i+=1