using System;

​

namespace Ekz_Sviatetc_15_IdenticalArrayElements

{

public class Program

{

    public static void Main()

{

int[] a={1, 2, 3, 4, 2};

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

{

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

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

{

Console.Write(i+" "+j);

break;

}

}

Console.ReadKey();

}

    }

}