
#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){
  for(;;){
    if(x->left==NIL){
      break;
    }
    else{
      x=x->left;
      return x;
    }
  }

}

Node treeMaximum(Node x){
  for(;;){
    if(x->right==NIL){
      break;
    }
    else{
      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;
  Node x = root;
  Node z;

  z = malloc(sizeof(struct node));
  z->key = k;
  z->left = NIL;
  z->right = NIL;

  while(1){
    if(x==NIL){
      break;
    }
    else{
      y=x;
      if(x->key < z->key){
	x=x->right;
       
      }
      else{
	x=x->left;
      }


    }
  }
  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;
}