UVa OJ 455 Periodic Strings

 Periodic Strings 

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

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

int main()
{
    int kases;
    char s[100];
    scanf("%d",&kases);
    while (kases--)
    {
        scanf("%s",s);
        int length = strlen(s);
        for (int i = 1; i <= length; i++)
        {
    
            if (length%i == 0)
            {            
                bool ok = true;
                for (int j = i; j < length; j++)
                    if (s[j] != s[j%i])
                    {    
                        ok = false;
                        break;
                    }
                if (ok)
                {
                    printf("%d\n",i);
                    break;
                }
            }    
        }
        if (kases != 0)
            printf("\n");
    }
    return 0;
}

本题没有难度，但由于没有认真审题，忽略了相邻两个输出之间要有空白行，提交了几次，认真审题是关键啊。