LeetCode 521 Longest Uncommon Subsequence I 解题报告

题目要求

Given a group of two strings, you need to find the longest uncommon subsequence of this group of two strings. The longest uncommon subsequence is defined as the longest subsequence of one of these strings and this subsequence should not be anysubsequence of the other strings.

A subsequence is a sequence that can be derived from one sequence by deleting some characters without changing the order of the remaining elements. Trivially, any string is a subsequence of itself and an empty string is a subsequence of any string.

The input will be two strings, and the output needs to be the length of the longest uncommon subsequence. If the longest uncommon subsequence doesn‘t exist, return -1.

题目分析及思路

给定两个字符串,要求找到最长的uncommon子串,并返回该子串的长度;若不存在就返回-1。最长的uncommon子串定义为:该子串是给定的两个字符串中某一个的最长子串,同时又不是另一个字符串的子串。我们可以考虑两种情况:一是这两个字符串相等,则不存在这样的uncommon子串,所以返回-1;二是这两个字符串不相等,则较长字符串本身就是这个最长的uncommon子串,所以返回它的长度。

python代码

class Solution:

def findLUSlength(self, a: str, b: str) -> int:

if a == b:

return -1

else:

return max(len(a), len(b))

原文地址:https://www.cnblogs.com/yao1996/p/10635321.html

时间: 2024-11-05 14:46:51

LeetCode 521 Longest Uncommon Subsequence I 解题报告的相关文章

LeetCode 521. Longest Uncommon Subsequence I

question: Given a group of two strings, you need to find the longest uncommon subsequence of this group of two strings. The longest uncommon subsequence is defined as the longest subsequence of one of these strings and this subsequence should not be

521. Longest Uncommon Subsequence I【easy】

521. Longest Uncommon Subsequence I[easy] Given a group of two strings, you need to find the longest uncommon subsequence of this group of two strings. The longest uncommon subsequence is defined as the longest subsequence of one of these strings and

LeetCode: 521 Longest Uncommon Subsequence I(easy)

题目: anysubsequence of the other strings. A subsequence is a sequence that can be derived from one sequence by deleting some characters without changing the order of the remaining elements. Trivially, any string is a subsequence of itself and an empty

521. Longest Uncommon Subsequence I

Given a group of two strings, you need to find the longest uncommon subsequence of this group of two strings. The longest uncommon subsequence is defined as the longest subsequence of one of these strings and this subsequence should not be any subseq

521. Longest Uncommon Subsequence I (最长不寻常子序列) by Python

题目: Given a group of two strings, you need to find the longest uncommon subsequence of this group of two strings. The longest uncommon subsequence is defined as the longest subsequence of one of these strings and this subsequence should not be any su

*521. Longest Uncommon Subsequence I (bit manipulation 2^n)

Given a group of two strings, you need to find the longest uncommon subsequence of this group of two strings. The longest uncommon subsequence is defined as the longest subsequence of one of these strings and this subsequence should not be any subseq

[LeetCode] 522. Longest Uncommon Subsequence II

Given a list of strings, you need to find the longest uncommon subsequence among them. The longest uncommon subsequence is defined as the longest subsequence of one of these strings and this subsequence should not be any subsequence of the other stri

521 Longest Uncommon Subsequence I 最长特殊序列 Ⅰ

给定两个字符串,你需要从这两个字符串中找出最长的特殊序列.最长特殊序列定义如下:该序列为某字符串独有的最长子序列(即不能是其他字符串的子序列).子序列可以通过删去字符串中的某些字符实现,但不能改变剩余字符的相对顺序.空序列为所有字符串的子序列,任何字符串为其自身的子序列.输入为两个字符串,输出最长特殊序列的长度.如果不存在,则返回 -1.示例 :输入: "aba", "cdc"输出: 3解析: 最长特殊序列可为 "aba" (或 "cd

[LeetCode] Longest Uncommon Subsequence I 最长非共同子序列之一

Given a group of two strings, you need to find the longest uncommon subsequence of this group of two strings. The longest uncommon subsequence is defined as the longest subsequence of one of these strings and this subsequence should not be any subseq