Geri izleme

def lcs_str(s1, s2):
    # LCS dizi geri iz
    m, n = len(s1), len(s2)
    dp = [[0] * (n + 1) for _ in range(m + 1)]
    for i in range(1, m + 1):
        for j in range(1, n + 1):
            if s1[i - 1] == s2[j - 1]:
                dp[i][j] = dp[i - 1][j - 1] + 1
            else:
                dp[i][j] = max(dp[i - 1][j], dp[i][j - 1])
    result = []
    i, j = m, n
    while i > 0 and j > 0:
        if s1[i - 1] == s2[j - 1]:
            result.append(s1[i - 1])
            i -= 1
            j -= 1
        elif dp[i - 1][j] > dp[i][j - 1]:
            i -= 1
        else:
            j -= 1
    return ''.join(reversed(result))
print(lcs_str("ABC", "AC"))