UVA-455Periodic Strings

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最新推荐文章于 2021-12-27 14:19:08 发布

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分类专栏： 2017暑假训练

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本文介绍了一种用于检测字符字符串最小周期的算法实现。通过读取输入文件中的多个测试用例，程序能够判断每个字符串的最小重复周期，并输出相应的结果。示例中包括了完整的C++代码实现。

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A character string is said to have period k if it can be formed by concatenating one or more repetitionsof another string of length k. For example, the string ”abcabcabcabc” has period 3, since it is formedby 4 repetitions of the string ”abc”. It also has periods 6 (two repetitions of ”abcabc”) and 12 (onerepetition of ”abcabcabcabc”).Write a program to read a character string and determine its smallest period.InputThe first line oif the input file will contain a single integer N indicating how many test case that yourprogram will test followed by a blank line. Each test case will contain a single character string of upto 80 non-blank characters. Two consecutive input will separated by a blank line.OutputAn integer denoting the smallest period of the input string for each input. Two consecutive output areseparated by a blank line.Sample Input1HoHoHoSample Output2

#include <iostream>
#include<cstdio>
#include<cstring>
#include<string.h>
#include<string>
#include<stdio.h>
#include<algorithm>
using namespace std;

int main()
{
    char ch[2000];
    int j;
    int t;
    scanf("%d",&t);
    int s=1;
    getchar();
    while(t--)
    {
        s=1;
        scanf("%s",ch);
        if(ch[0]=='\0')
        {
            printf("0\n");
            continue;
        }
        int f=1;
        while(f==1)
        {
            f=0;
            for(j=0; j<strlen(ch); j++)
            {
                if(ch[j]!=ch[j%s])
                {
                    f=1;
                    break;
                }
            }
            if(f==0&&strlen(ch)%s==0)
                break;
            else
            {
                f=1;
                s++;
            }
        }
        if(t==0)
        printf("%d\n",s);
        else
            printf("%d\n\n",s);
    }
    return 0;
}