#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=NIL;

Node treeMinimum(Node x){

}

Node treeSearch(Node u, int k){
  Node i=u;
   while(i!=NIL){
     if(i->key==k)return i;
     else if(i->key<k)i=i->right;
     else i=i->left;
}
return NIL;
}
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;
}

