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updated topological_sort.py #11285

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updated topological_sort.py #11285

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9b7e9e1
Update topological_sort.py
ShengLiuDev Feb 12, 2024
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Update topological_sort.py
ShengLiuDev Feb 12, 2024
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Merge branch 'master' of https://github.com/ShengLiuDev/TheAlgorithms…
ShengLiuDev Feb 12, 2024
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[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Feb 12, 2024
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Update topological_sort.py
ShengLiuDev Feb 12, 2024
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Merge branch 'master' of https://github.com/ShengLiuDev/TheAlgorithms…
ShengLiuDev Feb 12, 2024
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[pre-commit.ci] auto fixes from pre-commit.com hooks
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ShengLiuDev Feb 12, 2024
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Merge branch 'master' of https://github.com/ShengLiuDev/TheAlgorithms…
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ShengLiuDev Feb 12, 2024
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259 changes: 244 additions & 15 deletions sorts/topological_sort.py
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Original file line number Diff line number Diff line change
@@ -1,18 +1,243 @@
"""Topological Sort."""

# a
# / \
# b c
# / \
# d e
edges: dict[str, list[str]] = {
"a": ["c", "b"],
"b": ["d", "e"],
"c": [],
"d": [],
"e": [],
}
vertices: list[str] = ["a", "b", "c", "d", "e"]
test_cases: list[dict[str, list]] = [
{
# a
# / \
# b c
# / \
# d e
"edges": {
"a": ["c", "b"],
"b": ["d", "e"],
"c": [],
"d": [],
"e": [],
},
"vertices": ["a", "b", "c", "d", "e"],
},
{
# a
# / | \
# b c f
# / \ / \
# d e g h
# /
# i
"edges": {
"a": ["b", "c", "f"],
"b": ["d", "e"],
"c": [],
"d": [],
"e": [],
"f": ["g", "h"],
"g": ["i"],
"h": [],
"i": [],
},
"vertices": ["a", "b", "c", "d", "e", "f", "g", "h", "i"],
},
{
# a
# / \
# b c
# / / \
# d e f
# /
# g
# /
# h
# /
# i
# /
# j
# /
# k
"edges": {
"a": ["b", "c"],
"b": ["d"],
"c": ["e", "f"],
"d": ["g"],
"e": [],
"f": [],
"g": ["h"],
"h": ["i"],
"i": ["j"],
"j": ["k"],
"k": [],
},
"vertices": ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k"],
},
{
#
# a
# / \
# b c
# / \ / \
# d e f g
"edges": {
"a": ["b", "c"],
"b": ["d", "e"],
"c": ["f", "g"],
"d": [],
"e": [],
"f": [],
"g": [],
},
"vertices": ["a", "b", "c", "d", "e", "f", "g"],
},
{
#
# a
# / \
# b c
# / \ / \
# d e f g
# / \ \ \
# h i j k
# / \
# l m
# /
# n
#
#
"edges": {
"a": ["b", "c"],
"b": ["d", "e"],
"c": ["f", "g"],
"d": ["h", "i"],
"e": ["j"],
"f": [],
"g": ["k"],
"h": ["l"],
"i": ["m"],
"j": [],
"k": [],
"l": ["n"],
"m": [],
"n": [],
},
"vertices": ["a", "b", "c", "d", "e", "f", "g"],
},
{
# a
# /
# b
# /
# c
# /
# d
# /
# e
# /
# f
# /
# g
# /
# h
"edges": {
"a": ["b"],
"b": ["c"],
"c": ["d"],
"d": ["e"],
"e": ["f"],
"f": ["g"],
"g": ["h"],
"h": [],
},
"vertices": ["a", "b", "c", "d", "e", "f", "g", "h"],
},
{
# a
# / | \
# b c d
# / \
# e f
# / \
# g h
# / \
# i j
# / \
# k l
"edges": {
"a": ["b", "c", "d"],
"b": ["e"],
"c": [],
"d": ["f"],
"e": ["g"],
"f": ["h"],
"g": ["i"],
"h": ["j"],
"i": ["k"],
"j": ["l"],
"k": [],
"l": [],
},
"vertices": ["a", "b", "c", "d", "e", "f", "g", "h", "i"],
},
{
# a
# / \
# b c
# / \
# d e
"edges": {
"a": ["b", "c"],
"b": ["d"],
"c": ["e"],
"d": [],
"e": [],
},
"vertices": ["a", "b", "c", "d", "e"],
},
{
# a h
# / \ \
# b c i
# | | |
# d e j
# | |
# g f
"edges": {
"a": ["b", "c"],
"b": ["d"],
"c": ["e", "f"],
"d": ["g"],
"e": [],
"f": [],
"g": [],
"h": ["i"],
"i": ["j"],
"j": [],
},
"vertices": ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j"],
},
{
# a h k
# / \ \ \
# b c i l
# | | | |
# d e j m
# | |
# g f
"edges": {
"a": ["b", "c"],
"b": ["d"],
"c": ["e"],
"d": ["g"],
"e": ["f"],
"f": [],
"g": [],
"h": ["i"],
"i": ["j"],
"j": [],
"k": ["l"],
"l": ["m"],
"m": [],
},
"vertices": ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m"],
},
]


def topological_sort(start: str, visited: list[str], sort: list[str]) -> list[str]:
Expand All @@ -37,5 +262,9 @@ def topological_sort(start: str, visited: list[str], sort: list[str]) -> list[st


if __name__ == "__main__":
sort = topological_sort("a", [], [])
print(sort)
for idx, test_case in enumerate(test_cases, start=1):
print(f"Test Case {idx}:")
edges = test_case["edges"]
vertices = test_case["vertices"]
sort = topological_sort("a", [], [])
print(sort)