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Diffstat (limited to 'users/wpcarro/scratch/data_structures_and_algorithms/trickling-water.py')
-rw-r--r-- | users/wpcarro/scratch/data_structures_and_algorithms/trickling-water.py | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/users/wpcarro/scratch/data_structures_and_algorithms/trickling-water.py b/users/wpcarro/scratch/data_structures_and_algorithms/trickling-water.py new file mode 100644 index 000000000000..45621990ecf9 --- /dev/null +++ b/users/wpcarro/scratch/data_structures_and_algorithms/trickling-water.py @@ -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!") |