CodeForces 745A Hongcow Learns the Cyclic Shift

本文介绍了一个关于字符串循环移位的问题,通过不断将字符串末尾字符移到开头,Hongcow试图找出能通过这种方式产生的不同字符串的数量。文章提供了一个具体的算法实现,通过比较不同移位后的字符串来统计独特字符串的数量。

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A. Hongcow Learns the Cyclic Shift
time limit per test
2 seconds
memory limit per test
256 megabytes
input
standard input
output
standard output

Hongcow is learning to spell! One day, his teacher gives him a word that he needs to learn to spell. Being a dutiful student, he immediately learns how to spell the word.

Hongcow has decided to try to make new words from this one. He starts by taking the word he just learned how to spell, and moves the last character of the word to the beginning of the word. He calls this a cyclic shift. He can apply cyclic shift many times. For example, consecutively applying cyclic shift operation to the word "abracadabra" Hongcow will get words "aabracadabr", "raabracadab" and so on.

Hongcow is now wondering how many distinct words he can generate by doing the cyclic shift arbitrarily many times. The initial string is also counted.

Input

The first line of input will be a single string s (1 ≤ |s| ≤ 50), the word Hongcow initially learns how to spell. The string s consists only of lowercase English letters ('a'–'z').

Output

Output a single integer equal to the number of distinct strings that Hongcow can obtain by applying the cyclic shift arbitrarily many times to the given string.

Examples
input
abcd
output
4
input
bbb
output
1
input
yzyz
output
2
Note

For the first sample, the strings Hongcow can generate are "abcd", "dabc", "cdab", and "bcda".

For the second sample, no matter how many times Hongcow does the cyclic shift, Hongcow can only generate "bbb".

For the third sample, the two strings Hongcow can generate are "yzyz" and "zyzy".

思路:字符串的长度小于50,按题目要求操作,并判断是否出现过即可。
#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
int i,j,k,l;
char s[110],str[55][110];
int main()
{
	while(scanf("%s",s)!=EOF)
	{
		int len = strlen(s);
		int num = 1;
		int flag;
		strcpy(str[0],s);
		for(i = 1; i < len; i++)
		{
		    flag = 0;
			for (j = 0; j < i; j++)
			{
				str[i][j]=s[len-i+j];
			}
			for(k = i; k < len; k++)
			{
				str[i][k] = s[k-i];
			}
			for(l=0;l<i;l++)
			{
				if(strcmp(str[i],str[l])==0)
				{
					flag = 1;
					break;
				}
			}
			if(flag==0)
			   num++;
		}
		printf("%d\n",num);
	}
	return 0;
}


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