Math/ExtGCD.py

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Last update: 2023-06-29 00:35:03+09:00

Code

def extgcd(a: int, b: int) -> int:
    "ax + by = gcd(a,b) = d となる (x, y, d) を返す"
    if b == 0:
        return (1, 0, a)

    q, r = a // b, a % b
    x, y, d = extgcd(b, r)
    s, t = y, x - q * y

    return s, t, d # (qb + r)s + bt = dとなる s, t, d

ans = extgcd(30, 50)
print(ans)

Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.12.5/x64/lib/python3.12/site-packages/onlinejudge_verify/documentation/build.py", line 71, in _render_source_code_stat
    bundled_code = language.bundle(stat.path, basedir=basedir, options={'include_paths': [basedir]}).decode()
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/hostedtoolcache/Python/3.12.5/x64/lib/python3.12/site-packages/onlinejudge_verify/languages/python.py", line 96, in bundle
    raise NotImplementedError
NotImplementedError