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graph_clone.py
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graph_clone.py
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import collections
class GraphVertex:
def __init__(self, label):
self.label = label
self.edges = []
def clone_graph(G):
# Implement this placeholder.
return None
def copy_labels(edges):
return [e.label for e in edges]
def check_graph(node, G):
from test_framework.test_failure_exception import TestFailureException
vertex_set = set()
q = collections.deque()
q.append(node)
vertex_set.add(node)
while q:
vertex = q.popleft()
if vertex.label >= len(G):
raise TestFailureException('')
label1 = copy_labels(vertex.edges)
label2 = copy_labels(G[vertex.label].edges)
label1.sort()
label2.sort()
if label1 != label2:
raise TestFailureException('')
for e in vertex.edges:
if e not in vertex_set:
vertex_set.add(e)
q.append(e)
def clone_graph_test(k, edges):
if k <= 0:
raise RuntimeError('Invalid k value')
graph = [GraphVertex(i) for i in range(k)]
for (fr, to) in edges:
if fr < 0 or fr >= k or to < 0 or to >= k:
raise RuntimeError('Invalid vertex index')
graph[fr].edges.append(graph[to])
result = clone_graph(graph[0])
check_graph(result, graph)
from test_framework import test_utils_generic_main, test_utils
if __name__ == '__main__':
test_utils_generic_main.generic_test_main('graph_clone.tsv',
clone_graph_test)