import sys
input = sys.stdin.readline

from collections import deque

N=int(input())
AB=[list(map(int,input().split())) for i in range(N)]

B=[-1]*N
NX=[-1]*N


ONE=deque()
TWO=deque()

for i in range(N):
    x,y=AB[i]

    if y==1:
        ONE.append(i)
    elif y==2:
        TWO.append(i)

for i in range(N):
    x,y=AB[i]

    if x==1:
        B[i]=i+1
        NX[i+1]=i

    if y==2:
        k=ONE.popleft()
        B[i]=k
        NX[k]=i

ANS=[]

for i in range(N):
    if B[i]==-1:
        ANS.append(i)

        x=i
        while NX[x]!=-1:
            x=NX[x]
            ANS.append(x)

for i in range(N):
    ANS[i]+=1

for ans in ANS:
    print(ans)