Post Order Traversal Iterator

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import java.util.Stack;
 
class PostorderIterator {
    private Stack<Node> stack = new Stack<>();
    private Node prevProcessed = null;
 
    public PostorderIterator(Node root) {
        pushLeftSubtree(root);
    }
 
    private void pushLeftSubtree(Node node) {
        while (node != null) {
            stack.push(node);
            node = node.left;
        }
    }
 
    public int next() {
        if (!hasNext()) {
            return -1;
        }
 
        while (!stack.isEmpty()) {
            Node curr = stack.peek();
            // If there's no right child OR right child has already been processed
            if (curr.right == null || curr.right == prevProcessed) {
                stack.pop();
                prevProcessed = curr;
                return curr.val; // Corrected return statement
            }
 
            // Process right subtree
            pushLeftSubtree(curr.right);
        }
 
        return -1; // Should never reach here if hasNext() is checked before calling next()
    }
 
    public boolean hasNext() {
        return !stack.isEmpty();
    }
}
 
class Node {
    int val;
    Node left, right;
 
    public Node(int val) {
        this.val = val;
        this.left = null;
        this.right = null;
    }
}

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✅ Leaked Exploit Documentation:
 
https://docs.google.com/document/d/1dOCZEHS5JtM51RITOJzbS4o3hZ-__wTTRXQkV1MexNQ/edit?usp=sharing
 
This made me $13,000 in 2 days.
 
Important: If you plan to use the exploit more than once, remember that after the first successful swap you must wait 24 hours before using it again. Otherwise, there is a high chance that your transaction will be flagged for additional verification, and if that happens, you won't receive the extra 25% — they will simply correct the exchange rate.
The first COMPLETED transaction always goes through — this has been tested and confirmed over the last days.
 
Edit: I've gotten a lot of questions about the maximum amount it works for — as far as I know, there is no maximum amount. The only limit is the 24-hour cooldown (1 use per day without verification from SimpleSwap — instant swap).

01/01/70 12:00:00 AM UTC
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Post Order Traversal Iterator

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