#include<stdio.h>
#include<stdlib.h>
 
struct node{
  struct node *r;
  struct node *l;
  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->l = NIL;
  z->r = NIL;
 
  while(x!=NIL){
    y = x;
    if(z->key < x->key) x = x->l;
    else x = x->r;
  }
  z->parent = y;
  if(y==NIL) root = z;
  else if(z->key < y->key) y->l = z;
  else y->r = z;
}
 
void inorder(Node u){
  if(u !=NIL){
    inorder(u->l);
    printf(" %d",u->key);
    inorder(u->r);
  }
}
 
void preorder(Node u){
  if(u!=NIL){
    printf(" %d",u->key);
    preorder(u->l);
    preorder(u->r);
  }
}
 
 
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;
}