POJ 2406 Power Strings

 1 #include <iostream>
 2 #include <cstring>
 3 #include <string>
 4 #include <algorithm>
 5 #include <cstdio>
 6 #define MAXSIZE 1000100
 7 using namespace std;
 8 
 9 char a[MAXSIZE];
10 int Next[MAXSIZE];
11 int Len;
12 
13 int GetNext()
14 {
15     int i = 0, j = Next[0] = -1;
16     while (i < Len)
17     {
18         if (j == -1 || a[i] == a[j])
19             Next[++i] = ++j;
20         else
21             j = Next[j];
22     }
23 }
24 
25 int main(void)
26 {
27     ios::sync_with_stdio(false);
28     while (true)
29     {
30         cin >> a;
31         if (a[0] == '.')
32             return 0;
33         Len = strlen(a);
34         GetNext();
35         int period = Len - Next[Len];
36         if (Len % period == 0)
37             cout << Len / period << endl;
38         else
39             cout << 1 << endl;
40     }
41 
42     return 0;
43 }