#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 == 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] == 'f' ){
            scanf("%d", &x);
            //Node t = treeSearch(root, x);
            //if ( t != NIL ) printf("yes\n");
            //else printf("no\n");
        } else if ( com[0] == 'i' ){
            scanf("%d", &x);
            insert(x);
        } else if ( com[0] == 'p' ){
            inorder(root);
            printf("\n");
            preorder(root);
            printf("\n");
        } else if ( com[0] == 'd' ){
            scanf("%d", &x);
            //treeDelete(treeSearch(root, x));
        }
    }

    return 0;
}

