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  • Periodic Strigs, UVa455

                                                                    Periodic Strings

    Description

    A character string is said to have period k if it can be formed by concatenating one or more repetitions of another string of length k. For example, the string "abcabcabcabc" has period 3, since it is formed by 4 repetitions of the string "abc". It also has periods 6 (two  repetitions of "abcabc") and 12 (one repetition of "abcabcabcabc").Write a program to read a character string and determine its smallest period.

    Input


    The first line oif the input file will contain a single integer N indicating how many test case that your program will test followed by a blank line. Each test case will contain a single character string of up to 80 non-blank characters. Two consecutive input will separated by a blank line.

    Output

    An integer denoting the smallest period of the input string for each input. Two consecutive output are separated by a blank line.

    Sample Input

    1
    
    HoHoHo

    Sample Output

    2
    
    
    从1开始(该数同时被字符串长度取余为0),逐个尝试能否构成字符串的周期,若能,输出其最小周期,跳出循环。
    #include<stdio.h>
    #include<string.h>
    int main()
    {
        int n, count1 = 1;
        scanf("%d", &n);
        while(n--)
        {
          getchar();
          char str[83];
          scanf("%s", str);
          int length = strlen(str);
          for( int i=1; i<=length ; i++ )
          {
                 if((length%i)==0)
                 {
                     bool flag=true;
                     for( int j=i; j<length; j++ )
                        if(str[j] != str[j%i])
                        {
                            flag=false;  break;
                        }
    
                    if(flag)
                      {
                        if(count1!=1)
                          printf("
    ");
                        printf("%d
    ", i);
                        count1++;
                        break;
                      }
                 }
            }
        }
        return 0;
    }
    


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  • 原文地址:https://www.cnblogs.com/Genesis2018/p/9079926.html
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