#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 !=NIL){
    inorder(u->left);
    printf(" %d",u->key);
    inorder(u->right);
  }
}
void preorder(Node u){
  if(u!=NIL){
    printf(" %d",u->key);
    preorder(u->left);
    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;
  }