using System;

public class BankAccount {

   private string owner;
   private decimal balance;
   private BankAccount leftAccount, rightAccount;

   public BankAccount(string owner, decimal balance) {
      this.owner = owner; 
      this.balance = balance;
      this.leftAccount = null;
      this.rightAccount = null;
   }

   public BankAccount(string owner, decimal balance, BankAccount leftAccount, BankAccount rightAccount) {
      this.owner = owner; 
      this.balance = balance;
      this.leftAccount = leftAccount;
      this.rightAccount = rightAccount;
   }

   private bool LeafAccount(){
      return leftAccount == null && rightAccount == null;
   }
 
   public decimal Balance () {
     // Exercise
   }

   public void Withdraw (decimal amount) {
     // Exercise
   }

   public void Deposit (decimal amount) {
     // Exercise
   }

   public void DistributeEven(){
     // Exercise
   }

   public override string ToString() {
      return String.Format("{0} {1,12:c2} (local amount: {2,12:c2})", owner, Balance(), balance);
  }

}