最长公共子序列

Posted 2022-06-29 ivyharding

给定两个字符串，求解这两个字符串的最长公共子序列（Longest Common Sequence）。比如字符串1：BDCABA；字符串2：ABCBDAB

则这两个字符串的最长公共子序列长度为4，最长公共子序列是：BCBA

 

 

代码：

def findLCS(A, n, B, m):
        # write code here
        record = 0
        maxNum = 0
        result = []
        
        for i in range(n):
            for j in range(m):
                if A[i] == B[j]:
                    if A[i] not in result:
                        record += 1
#                         print(A[i])
                        result.append(A[i])
                    if maxNum < record:
                        maxNum = record
        return maxNum,"".join(result)

if __name__ == "__main__":
    A = "BDCABA"
    n = 6
    B = "ABCBDAB"
    m =7
    print(findLCS(A, n, B, m))