#include<stdio.h>
#include<stdlib.h>
#define NIL NULL

struct node{
  struct node *right;
  struct node *left;
  struct node *parent;
  int key;
};
typedef struct node * Node;


Node root;

Node treeMinimum(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;

  y = NIL;
  x = root;

  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;
  } //if T is empty
  else if( z->key < y->key ) {
    y->left = z;
  }
  else {
    y->right = z;
  }

}

void inorder(Node u){

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

}
void preorder(Node u){

  if(u == NIL) {
    return;
  }
  else {
    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;
}