// Transaction.java
/*
 (provided code)
 Transaction is just a dumb struct to hold
 one transaction. Supports toString().
*/
public class Transaction {
    public int from;
    public int to;
    public int amount;
    
    public Transaction(int from, int to, int amount) {
        this.from = from;
        this.to = to;
        this.amount = amount;
    }
    
    public String toString() {
        return("from:" + from + " to:" + to + " amt:" + amount);
    }
}