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1961:Period

题目描述
For each prefix of a given string S with N characters (each character has an ASCII code between 97 and 126, inclusive), we want to know whether the prefix is a periodic string. That is, for each i (2 <= i <= N) we want to know the largest K > 1 (if there is one) such that the prefix of S with length i can be written as AK ,that is A concatenated K times, for some string A. Of course, we also want to know the period K.
输入解释
The input consists of several test cases. Each test case consists of two lines. The first one contains N (2 <= N <= 1 000 000) – the size of the string S.The second line contains the string S. The input file ends with a line, having the
number zero on it.
输出解释
For each test case, output "Test case #" and the consecutive test case number on a single line; then, for each prefix with length i that has a period K > 1, output the prefix size i and the period K separated by a single space; the prefix sizes must be in increasing order. Print a blank line after each test case.
输入样例
3
aaa
12
aabaabaabaab
0
输出样例
Test case #1
2 2
3 3

Test case #2
2 2
6 2
9 3
12 4

该题目是Virtual Judge题目,来自 北京大学POJ

源链接: POJ-1961

最后修改于 2020-10-29T06:19:04+00:00 由爬虫自动更新

共提交 0

通过率 --%
时间上限 内存上限
3000 30000