求n至少为多大时，n个1组成的整数能被2013整除？

public class javaone {
     public static void main (String[] arg)
     {
         int a = 1,n=1;
         while(a!=0)
         {
             a = a*10 + 1;
             a = a%2013;
             n++;
         }

         System.out.println(n + "个1能被2013整除");
     }
}

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