
"""simple docstring"""





import math

from numpy import inf
from scipy.integrate import quad







def 	__a     (		__lowerCamelCase  ):
   if num <= 0:
      raise ValueError("math domain error"  )

   return quad(__lowerCamelCase,		0,		__lowerCamelCase,		args=(__lowerCamelCase)  )[0]







def 	__a     (		__lowerCamelCase,		__lowerCamelCase  ):
   return math.pow(__lowerCamelCase,		z - 1  ) * math.exp(-x  )


if __name__ == "__main__":
    from doctest import testmod

    testmod()




"""simple docstring"""





from __future__ import annotations







def 	__a     (		__lowerCamelCase,		__lowerCamelCase  ):
   UpperCAmelCase_     ,   UpperCAmelCase_					:					str			     =    set(__lowerCamelCase  ), [start]

   while stack:
      UpperCAmelCase_					:					Any			     =    stack.pop()
      explored.add(__lowerCamelCase  )
      # Differences from BFS:
      # 1) pop last element instead of first one
      # 2) add adjacent elements to stack without exploring them
      for adj in reversed(graph[v]  ):
         if adj not in explored:
            stack.append(__lowerCamelCase  )
   return explored


_a		       =							{
    'A': ['B', 'C', 'D'],
    'B': ['A', 'D', 'E'],
    'C': ['A', 'F'],
    'D': ['B', 'D'],
    'E': ['B', 'F'],
    'F': ['C', 'E', 'G'],
    'G': ['F'],
}

if __name__ == "__main__":
    import doctest

    doctest.testmod()
    print(depth_first_search(G, 'A'))


