// editor5
// editor1
#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct node*left,*right;
}Node;

Node*root = NULL;

Node *create(int num){
    Node *newnode = (Node*) malloc (sizeof(Node));
    newnode->data = num;
    newnode->left = NULL;
    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 if(num > root->data){
        root->right = insert(root->right,num);
    }
    return root;
}
void inorder(Node *root){
    if(root!=NULL){
        inorder(root->left);
        inorder(root->right);
        printf("% ",root->data);
    }
}
int main(){
    int num;
    int itr,n;
    scanf("%d",&n);
    if(n<0){
        printf("Invalid input");
        return 0;
    }
    for(itr=0;itr<n;itr++){
        scanf("%d",&num);
        
        root = insert(root,num);
    }
    inorder(root);
    return 0;
}