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459.重复的子字符串.cpp
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459.重复的子字符串.cpp
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/*
* @lc app=leetcode.cn id=459 lang=cpp
*
* [459] 重复的子字符串
*/
// @lc code=start
class Solution
{
public:
void getNext(int *next, const string &s)
{
next[0] = 0;
int j = 0;
for (int i = 1; i < s.size(); i++)
{
while (j > 0 && s[i] != s[j])
{
j = next[j - 1];
}
if (s[i] == s[j])
{
j++;
}
next[i] = j;
}
}
bool repeatedSubstringPattern(string s)
{
if (s.size() == 0)
{
return false;
}
int next[s.size()];
getNext(next, s);
int len = s.size();
if (next[len - 1] != 0 && len % (len - (next[len - 1])) == 0)
{
return true;
}
return false;
}
};
// @lc code=end