DP/LongestCommonSubsequence.py

View this file on GitHub
Last update: 2022-05-22 23:05:29+09:00

Code

def LCS(S, T):
    L1 = len(S)
    L2 = len(T)
    dp = [[0] * (L2 + 1) for i in range(L1 + 1)]

    for i in range(L1 - 1, -1, -1):
        for j in range(L2 - 1, -1, -1):
            r = max(dp[i + 1][j], dp[i][j + 1])
            if S[i] == T[j]:
                r = max(r, dp[i + 1][j + 1] + 1)
            dp[i][j] = r
    # dp[0][0] が長さの解

    # ここからは復元処理
    res = []
    i = 0; j = 0
    while i < L1 and j < L2:
        if S[i] == T[j]:
            res.append(S[i])
            i += 1; j += 1
        elif dp[i][j] == dp[i + 1][j]:
            i += 1
        elif dp[i][j] == dp[i][j + 1]:
            j += 1
    return "".join(res)

print(LCS("asdcsascsadsd", "assdcascdascasca"))

Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.12.3/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/3.12.3/x64/lib/python3.12/site-packages/onlinejudge_verify/languages/python.py", line 96, in bundle
    raise NotImplementedError
NotImplementedError