#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;

/*Node treeMinimum(Node x){


}*/

/*Node treeMaximum(Node x){


}*/

/*Node treeSearch(Node u, int k){


}*/

/*Node treeSuccessor(Node x){


}*/

/*void treeDelete(Node z){
  Node y; // node to be deleted
  Node x; // child of y



}*/

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

