HDU 3746 Cyclic Nacklace

题意:给你几组字符串，每组添加多少个字符能够构成循环.

题解:最小循环节,注意讨论的三种情况，题上刚好给了这三种情况（要是不给我这弱鸡又考虑不全了）

#include <iostream>
#include <cstring>
#include <string>
#include <algorithm>
using namespace std;

char s[100100];
int Next[100100];
int Len;

void GetNext()
{
    int i = 0, j = Next[0] = -1;
    while (i < Len)
    {
        if (j == -1 || s[i] == s[j])
            Next[++i] = ++j;
        else
            j = Next[j];
    }
}

int main(void)
{
    int T;
    ios::sync_with_stdio(false);
    cin >> T;
    while (T--)
    {
        cin >> s;
        Len = strlen(s);
        GetNext();
        int circle = Len - Next[Len];
        if (!Next[Len])
            cout << Len << endl;
        else
        {
            int temp = Len % circle;
            if (!temp)
                cout << 0 << endl;
            else
                cout << circle - temp << endl;
        }
    }

    return 0;
}