POJ - 2406 - Power Strings （KMP）

标签：acm   poj   kmp   

Description

Input

Output

Sample Input

abcd
aaaa
ababab
.

Sample Output

1
4
3

Hint

Source

AC代码：

#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std; 

char str[1000005];
int next[1000005];

int main() {
	while(scanf("%s", str) && str[0] != '.') {
		int i = 0, j = -1, len = strlen(str);
		next[0] = -1;
		while(i < len) {
			if(j == -1 || str[i] == str[j]) next[++i] = ++j;
			else j = next[j];
		}
		
		if(len % (len - next[len]) == 0) printf("%d\n", len / (len - next[len]));
		else printf("1\n");
	}
	return 0;
}

POJ - 2406 - Power Strings （KMP）

标签：acm   poj   kmp   

原文地址：http://blog.csdn.net/u014355480/article/details/43899389