using System;

public class Program

{

    public static void Main()

    {

        int i=0,j=0;

​

        int[] a = {1,1,1,1,1,1,2,3,4,5,6,7,7,8,9};

        for(i=0;i<a.Length;i++){

            for(j=i+1;j<a.Length-1;j++){

                if(a[i]==a[j]){

                    Console.WriteLine("{0}",a[j]);

                    int x=a[i];

                    while(x==a[j])

                    {

                        i++;

                        j++;

                    }

                    //j++;

                }

            }

        }

​

    }

}