#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){
        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;
}
