class Bank {
    long [] balance;
    public Bank(long[] balance) {this.balance=balance;}
    
    public boolean transfer(int account1, int account2, long money) {
        if(account1>balance.length || account2>balance.length || balance[--account1]<money)
            return false;
        
        balance[account1]-=money;
        balance[account2-1]+=money;
        return true;
    }
    
    public boolean deposit(int account, long money) {
        if(account>balance.length)
            return false;
        balance[account-1]+=money;
        return true;
    }
    
    public boolean withdraw(int account, long money) {
        if(account>balance.length || balance[--account]<money)
            return false;
        balance[account]-=money;
        return true;
    }
}