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								universe/data_structures_and_algorithms/trickling-water.py
									
										
									
									
									
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								universe/data_structures_and_algorithms/trickling-water.py
									
										
									
									
									
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							|  | @ -0,0 +1,38 @@ | |||
| class Node(object): | ||||
|     def __init__(self, value, children=[]): | ||||
|         self.value = value | ||||
|         self.children = children | ||||
| 
 | ||||
| 
 | ||||
| ################################################################################ | ||||
| # Solution | ||||
| ################################################################################ | ||||
| def trip_time(node): | ||||
|     s = [] | ||||
|     result = 0 | ||||
|     s.append((node.value, node)) | ||||
|     while s: | ||||
|         p, node = s.pop() | ||||
|         if not node.children: | ||||
|             result = max(result, p) | ||||
|         for x in node.children: | ||||
|             s.append((p + x.value, x)) | ||||
|     return result | ||||
| 
 | ||||
| 
 | ||||
| ################################################################################ | ||||
| # Tests | ||||
| ################################################################################ | ||||
| tree = Node( | ||||
|     0, | ||||
|     children=[ | ||||
|         Node(5, children=[Node(6)]), | ||||
|         Node(2, children=[ | ||||
|             Node(6), | ||||
|             Node(10), | ||||
|         ]), | ||||
|         Node(3, children=[Node(2, children=[Node(11)])]), | ||||
|     ]) | ||||
| 
 | ||||
| assert trip_time(tree) == 16 | ||||
| print("Tests pass!") | ||||
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