#include<stdio.h>
#include<stdlib.h>

typedef struct company {
    int data;
    struct company *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
        root->right=insert(root->right,num);
    return root;
}
void inorder(node* root) {
    if(root!=NULL) {
        inorder(root->left);
        printf("%d",root->data);
        inorder(root->right);
    }
}

int main() {
    int size,num,i;
    scanf("%d",&size);
    if(size<0) {
        printf("Invalid input");
        return 0;
    
    }
    inorder(root);
    return 0;
}