题解

# include<iostream>
using namespace std;
struct node{
	int data;
	node *next;
};
int main(){
	node p;
	node a[103];
	int n,t;
	cin>>n;
	
	for(int i=0;i<=n;++i){
		a[i].data=i;
		a[i].next=NULL;
	}
	for(int i=1;i<=n;++i){
		cin>>t;
		a[t].next=&a[i];
	}
	for(p=a[0];p.next!=NULL;p=*(p.next)) cout<<p.next->data<<" ";
	return 0;
}