#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct node* left;
    struct node* right;
}Node;
Node *root=NULL;
Node *create(int num){
    Node *newnode=(Node*)malloc(1*sizeof(Node));
    newnode->data=num;
    newnode->left=NULL;
    newnode->right=NULL;
    return newnode;
}
void postorder(Node *root){
    if(root!=NULL){
        postorder(root->left);
        postorder(root->right);
        printf("%d ",root->data);
    }
}
int main(){
    int n,i,num;
    scanf("%d",&n);
    for(i=1;i<n;i++){
        scanf("%d",&num);
        Node *root=create(root,num);
    }
    postorder(root);
    return 0;
}