// editor1
#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct node *left;
    struct node *right;
}Node;
Node *create(int num){
    Node *newnode=(Node*)malloc(sizeof(Node));
    newnode->data=num;
    newnnode->left=newnode=right=NULL;
    return newnode;
}
Node *insert(Node *root,int num){
  if(root==NULL){
      return create(num);
  }    
  if(num<root->data){
      root->left=insert(root->left,num);
  }
  else{
      root->right=insert(root->right,num);
  }
  return newnode;
}
void postorder(Node *root){
    if(root==NULL){
        return;
    }
    postorder(root->left);
    postorder(root->right);
    printf("%d ",root->data);
}
int main(){
    int n,num;
    scanf("%d",&n);
    if(n<=0){
        printf("Invalid input");
        return 0;
    }
    Node *root=NULL;
    for(int i=0;i<n;i++){
        scanf("%d",&num);
        root=insert(root,num);
    }
    postorder(root);
    return 0;
}