// editor2
#include<stdio.h>
#include<stdio.h>
#include<string.h>
typedef struct node{
    int data;
    struct node *right ;
    struct node *left;
}nd;
nd *root=NULL;
nd *create(int num){
    nd newnode=(nd)malloc(sizeof(nd));
    newnode->data=num;
    newnode->left=NULL;
    newnode->right=NULL;
    return newnode;
    
}
nd *insert(nd *root,int num){
    if(root==NULL){
        return create(num);
        
    }
    if(num<root>data)
     root->left=insert(root->right,num);
     return root;
}
void inorder(nd *root){
    if(root==NULL){
        return ;
    }
    inorder(root->left);
    printf("%d",root->data);
    inorder(root->right);
}
int main(){
    int n,val,num;
    nd *root=NULL;
    scanf("%d",&n);
    if(n<0){
        printf("Invalid input");
        return 0;
    }
    for(int i=0;i<n;i++){
    scanf("%d",&num);
    root=insert(root,num);
    }
    insert(root,val);
    inorder(root);
    return 0;
    
}