字符串

地址https://hihocoder.com/problemset/problem/1721题目时间限制:10000ms单点时限:1000ms内存限制:256MB描述愚人节那天，小Ho在小Hi的一个回文字符串中添加了一个字符。你能帮助小Hi找到被添加的...

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地址https://leetcode.com/problems/substring-with-concatenation-of-all-words/description/题目You are given a string, s, and a list o...

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