public BankAccount(int balance)
{
this.balance = balance;
var m = new Mem3nto(balance);
changes.Add(m);
}
public Mem3nto Deposit(int amount)
{
balance += amount;
var m = new Mem3nto(balance);
changes.Add(m);
++current;
return(m);
}
public Mem3nto Restore(Mem3nto m)
{
if (m != null)
{
balance = m.Balance;
changes.Add(m);
return(m);
}
else
{
return(null);
}
}