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Create travelling_salesman_problem.py #11939

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@OmMahajan29 OmMahajan29 commented Oct 10, 2024

added travelling salesman problem under dynamic programming

Describe your change:

  • Add an algorithm?
  • Fix a bug or typo in an existing algorithm?
  • Add or change doctests? -- Note: Please avoid changing both code and tests in a single pull request.
  • Documentation change?

Checklist:

  • I have read CONTRIBUTING.md.
  • This pull request is all my own work -- I have not plagiarized.
  • I know that pull requests will not be merged if they fail the automated tests.
  • This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
  • All new Python files are placed inside an existing directory.
  • All filenames are in all lowercase characters with no spaces or dashes.
  • All functions and variable names follow Python naming conventions.
  • All function parameters and return values are annotated with Python type hints.
  • All functions have doctests that pass the automated testing.
  • All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
  • If this pull request resolves one or more open issues then the description above includes the issue number(s) with a closing keyword: "Fixes add travelling salesman problem #11938".

OmMahajan29 and others added 2 commits October 10, 2024 20:17
added travelling salesman problem under dynamic programming
@algorithms-keeper algorithms-keeper bot added the tests are failing Do not merge until tests pass label Oct 10, 2024
@algorithms-keeper algorithms-keeper bot added the require tests Tests [doctest/unittest/pytest] are required label Oct 10, 2024
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visited_all = (1 << n) - 1

@lru_cache(None)
def visit(city: int, mask: int) -> int:

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function visit

@algorithms-keeper algorithms-keeper bot added the awaiting reviews This PR is ready to be reviewed label Oct 10, 2024
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visited_all = (1 << n) - 1

@lru_cache(None)
def visit(city: int, mask: int) -> int:

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function visit

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visited_all = (1 << n) - 1

@lru_cache(None)
def visit(city: int, mask: int) -> int:

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function visit

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raise ValueError("Distance cannot be negative")
visited_all = (1 << n) - 1
@lru_cache(None)
def visit(city: int, mask: int) -> int:

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function visit

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visited_all = (1 << n) - 1

@lru_cache(None)
def visit(city: int, mask: int) -> int:

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function visit

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memo = [[-1] * (1 << n) for _ in range(n)]
visited_all = (1 << n) - 1

def visit(city: int, mask: int) -> int:

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function visit

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memo = [[-1] * (1 << n) for _ in range(n)]
visited_all = (1 << n) - 1

def visit(city: int, mask: int) -> int:

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function visit

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memo = [[-1] * (1 << n) for _ in range(n)]
visited_all = (1 << n) - 1

def visit(city: int, mask: int) -> int:

Choose a reason for hiding this comment

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function visit

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memo = [[-1] * (1 << n) for _ in range(n)]
visited_all = (1 << n) - 1 # All cities visited mask

def visit(city: int, mask: int) -> int:

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function visit

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memo = [[-1] * (1 << n) for _ in range(n)]
visited_all = (1 << n) - 1 # All cities visited mask

def visit(city: int, mask: int) -> int:

Choose a reason for hiding this comment

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function visit

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# Memoization table
memo = [[-1] * (1 << n) for _ in range(n)]
visited_all = (1 << n) - 1 # All cities visited mask
def visit(city: int, mask: int) -> int:

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function visit

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memo = [[-1] * (1 << n) for _ in range(n)]
visited_all = (1 << n) - 1 # All cities visited mask

def visit(city: int, mask: int) -> int:

Choose a reason for hiding this comment

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function visit

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Python:

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# Memoization table
memo = [[-1] * (1 << n) for _ in range(n)]
visited_all = (1 << n) - 1 # All cities visited mask
def visit(city: int, mask: int) -> int:

Choose a reason for hiding this comment

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function visit

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Python:

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#!/usr/bin/env python3


def tsp(distances: list[list[int]]) -> int:

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function tsp

memo = [[-1] * (1 << n) for _ in range(n)]
visited_all = (1 << n) - 1 # All cities visited mask

def visit(city: int, mask: int) -> int:

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As there is no test file in this pull request nor any test function or class in the file dynamic_programming/travelling_salesman_problem.py, please provide doctest for the function visit

@algorithms-keeper algorithms-keeper bot removed the tests are failing Do not merge until tests pass label Oct 10, 2024
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cclauss commented Nov 1, 2024

Closing require_tests PRs to prepare for Hacktoberfest

@cclauss cclauss closed this Nov 1, 2024
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add travelling salesman problem
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