import pyutil as pyu
pyu.get_local_pyinfo()

print(pyu.ps2("python-dotenv"))

from typing import List

class Solution:
  def numTrees(self, n: int) -> int:
    # G[i] := # Of unique BST's that store values 1..i
    G = [1, 1] + [0] * (n - 1)

    for i in range(2, n + 1):
      for j in range(i):
        G[i] += G[j] * G[i - j - 1]

    return G[n]

new Solution().numTrees()