Power Strings
Time Limit: 3000MS |
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Memory Limit: 65536K |
Total Submissions: 33636 |
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Accepted: 13973 |
Description Given two strings a and b we define a*b to be their concatenation. For example, if a = "abc" and b = "def" then a*b = "abcdef". If we think of concatenation as multiplication, exponentiation by a non-negative integer is defined in the normal way: a^0 = "" (the empty string) and a^(n+1) = a*(a^n).
Input Each test case is a line of input representing s, a string of printable characters. The length of s will be at least 1 and will not exceed 1 million characters. A line containing a period follows the last test case.
Output For each s you should print the largest n such that s = a^n for some string a.
Sample Input abcd
aaaa
ababab
.
Sample Output 1
4
3 题目大意:给出一个字符串,求这个串是有几个子串构成的
思路:用KMP算法中的next数组,这个字符串的next数组里边,字符串的总长度减去最后一个字符所对应的next值就是子串的长度
具体为什么,应该是next数组的值是根据这个字符串本身,用一定规则得出的,这个真的好巧妙的说,kmp算法,好好看看。
2014,12,5
#include
#include
char x[1100000];
int next[1100000];
void getnext(char s[]){
int len1,i,j;
len1=strlen(s);
i=0;j=-1;
next[i]=j;
while(i
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