
'''simple docstring'''
from __future__ import annotations

from collections import Counter
from random import random






class    UpperCAmelCase_				:





 def __init__(    self):
     snake_case_ :    Any     			=						{}





 def        snake_case__		(    self ,       lowercase_):
     snake_case_ :    List[Any]     			=						{}





 def        snake_case__		(    self ,       lowercase_ ,       lowercase_ ,       lowercase_):
     if nodea not in self.connections:
         self.add_node(lowercase_)
     if nodea not in self.connections:
         self.add_node(lowercase_)
     snake_case_ :    Union[str, Any]     			=						probability





 def        snake_case__		(    self):
     return list(self.connections)





 def        snake_case__		(    self ,       lowercase_):
     snake_case_ :    Tuple     			=						0
     snake_case_ :    Union[str, Any]     			=						random()

     for dest in self.connections[node]:
         current_probability += self.connections[node][dest]
         if current_probability > random_value:
             return dest
     return ""


def 						UpperCamelCase_     (	__SCREAMING_SNAKE_CASE,		__SCREAMING_SNAKE_CASE,		__SCREAMING_SNAKE_CASE       ):
    """simple docstring"""






    snake_case_ :    List[str]     			=						MarkovChainGraphUndirectedUnweighted()

    for nodea, nodea, probability in transitions:
        graph.add_transition_probability(__SCREAMING_SNAKE_CASE,		__SCREAMING_SNAKE_CASE,		__SCREAMING_SNAKE_CASE       )

    snake_case_ :    int     			=						Counter(graph.get_nodes()       )
    snake_case_ :    Tuple     			=						start

    for _ in range(__SCREAMING_SNAKE_CASE       ):
        snake_case_ :    Optional[int]     			=						graph.transition(__SCREAMING_SNAKE_CASE       )
        visited[node] += 1

    return visited


if __name__ == "__main__":
  import doctest

  doctest.testmod()






'''simple docstring'''
from __future__ import annotations

def 						UpperCamelCase_     (	__SCREAMING_SNAKE_CASE       ):
    """simple docstring"""






    snake_case_ :    List[Any]     			=						0.00
    snake_case_ :    int     			=						0
    for resistor in resistors:
        if resistor <= 0:
            snake_case_ :    Dict     			=						f'Resistor at index {index} has a negative or zero value!'
            raise ValueError(__SCREAMING_SNAKE_CASE       )
        first_sum += 1 / float(__SCREAMING_SNAKE_CASE       )
        index += 1
    return 1 / first_sum

def 						UpperCamelCase_     (	__SCREAMING_SNAKE_CASE       ):
    """simple docstring"""






    snake_case_ :    Union[str, Any]     			=						0.00
    snake_case_ :    List[Any]     			=						0
    for resistor in resistors:
        sum_r += resistor
        if resistor < 0:
            snake_case_ :    str     			=						f'Resistor at index {index} has a negative value!'
            raise ValueError(__SCREAMING_SNAKE_CASE       )
        index += 1
    return sum_r


if __name__ == "__main__":
  import doctest

  doctest.testmod()




