#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){
  while (x->left != NIL) {
    x = x->left;
  }
  return x;
}

Node treeMaximum(Node x){
  while (x->right != NIL) {
    x = x->right;
  }
  return 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; //xの親
  Node x = root; //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; // T empty
  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] == '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;
}

