piotr

class Bank {
	int[] balances = {0, 100, 0};

	void send(int from, int to, int amount) {
		if (balances[from] >= amount) {
			balances[from] -= amount;
			balances[to] += amount;
		}
	}

	void printBalances() {
		for (int i = 0; i < balances.length; i++) {
			System.Out.printLn(balances[i]);
		}
	}
}

public static void main(String[] args) {
	Bank bank = new Bank();
	bank.send(1, 0, 50);
	bank.printBalances();	
}