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1961. Period

23419729
This commit is contained in:
Baoshuo Ren 2022-04-12 15:14:42 +08:00
parent 59821f2755
commit d351581fbf
Signed by: baoshuo
GPG Key ID: 70F90A673FB1AB68

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POJ/1961/1961.cpp Normal file
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#include <iostream>
#include <string>
using std::cin;
using std::cout;
const char endl = '\n';
const int N = 1e6 + 5;
int t, n, next[N];
std::string s;
int main() {
std::ios::sync_with_stdio(false);
while (cin >> n, n) {
cout << "Test case #" << ++t << endl;
cin >> s;
s = ' ' + s;
next[1] = 0;
for (int i = 2, j = 0; i <= n; i++) {
while (j && s[i] != s[j + 1]) j = next[j];
if (s[i] == s[j + 1]) j++;
next[i] = j;
}
for (int i = 2; i <= n; i++) {
int len = i - next[i];
if (i % len == 0 && i / len > 1) {
cout << i << ' ' << i / len << endl;
}
}
cout << endl;
}
return 0;
}