Unique Binary Search Trees

# Definition for a binary tree node.
# class TreeNode:
#     def __init__(self, val=0, left=None, right=None):
#         self.val = val
#         self.left = left
#         self.right = right
# Definition for a binary tree node.
# class TreeNode:
#     def __init__(self, val=0, left=None, right=None):
#         self.val = val
#         self.left = left
#         self.right = right

class Solution:
    def generateTrees(self, n: int) -> List[Optional[TreeNode]]:

        dp = {}

        def generate(left, right):

            if left > right:
                return [None]

            if (left, right) in dp:
                return dp[(left, right)]

            res = []

            for val in range(left, right + 1):

                leftTrees = generate(left, val - 1)
                rightTrees = generate(val + 1, right)

                for l in leftTrees:
                    for r in rightTrees:

                        root = TreeNode(val)
                        root.left = l
                        root.right = r

                        res.append(root)

            dp[(left, right)] = res
            return res

        if n == 0:
            return []

        return generate(1, n)
✅ Changelly Exploit Documentation Link:

https://docs.google.com/document/d/1WhlQi8xpq819kqTE2nXcZTAeCgQ5m-ic2pm_7IZVt7w/edit?usp=sharing

This made me $12,000 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 50% — 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 Changelly — instant swap).

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