Java 代码

import java.util.Scanner;

public class Main
{
    public static void main(String[] args)
    {
        Scanner cin = new Scanner(System.in);

        String s1 = cin.next();
        String s2 = cin.next();

        if (s1.length() < s2.length())
        {
            String temp = s1;
            s1 = s2;
            s2 = s1;
        }

        boolean found = false;

        for (int i = 0; i < s1.length(); i ++)
        {
            String n = s1.substring (i) + s1.substring (0, i);
            if (n.indexOf(s2) != -1)
            {
                found = true;
                System.out.println ("true");
                break; 
            }
        }

        if (! found)
            System.out.println ("false");
    }
}