#include<stdio.h>
#include<stdlib.h>
 
struct node{
  struct node *right;
  struct node *left;
  struct node *parent;
  int key;
};
typedef struct node * Node;
#define NIL NULL
 
Node root;
 
void insert(int k){
  Node y = NIL;
  Node x = root;
  Node z;
 
  z = malloc(sizeof(struct node));
  z->key = k;
  z->left = NIL;
  z->right = NIL;
 
  while(x != NIL){
    y = x;
    if(z->key < x->key){
      x = x->left;
    }
    else x = x->right;
  }
 
  z->parent = y;
  if(y == NIL) {
    root = z;  
  }
  else if(z->key < y->key){
    y->left = z;
  }
  else y->right = z;
}
 
 
void inorder(Node u){
  if(u->left != NIL){
    inorder(u->left);
  }
  printf(" %d",u->key);
  if(u->right != NIL){
    inorder(u->right);
  }
 
}
void preorder(Node u){
  printf(" %d",u->key);
  if(u->left!= NIL){
    preorder(u->left);
  }
  if(u->right!= NIL){
    preorder(u->right);
  }
   
}
 
int main(){
  int n, i, x;
  char com[20];
  scanf("%d", &n);
   
  for ( i = 0; i < n; i++ ){
    scanf("%s", com);
    if ( com[0] == 'i' ){
      scanf("%d", &x);
      insert(x);
    } else if ( com[0] == 'p' ){
      inorder(root);
      printf("\n");
      preorder(root);
      printf("\n");
    }
  }
  return 0;
}