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authorVincent Ambo <mail@tazj.in>2021-12-13T22·51+0300
committerVincent Ambo <mail@tazj.in>2021-12-13T23·15+0300
commit019f8fd2113df4c5247c3969c60fd4f0e08f91f7 (patch)
tree76a857f61aa88f62a30e854651e8439db77fd0ea /users/wpcarro/scratch/data_structures_and_algorithms/trickling-water.py
parent464bbcb15c09813172c79820bcf526bb10cf4208 (diff)
parent6123e976928ca3d8d93f0b2006b10b5f659eb74d (diff)
subtree(users/wpcarro): docking briefcase at '24f5a642' r/3226
git-subtree-dir: users/wpcarro
git-subtree-mainline: 464bbcb15c09813172c79820bcf526bb10cf4208
git-subtree-split: 24f5a642af3aa1627bbff977f0a101907a02c69f
Change-Id: I6105b3762b79126b3488359c95978cadb3efa789
Diffstat (limited to 'users/wpcarro/scratch/data_structures_and_algorithms/trickling-water.py')
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diff --git a/users/wpcarro/scratch/data_structures_and_algorithms/trickling-water.py b/users/wpcarro/scratch/data_structures_and_algorithms/trickling-water.py
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+++ b/users/wpcarro/scratch/data_structures_and_algorithms/trickling-water.py
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+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!")