/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	private static void what( int[] arr, int i )
	{
		if( i >= arr.length )
		    return;
 
		arr[i] = i;
		what( arr, i+1 );
 
	}
	private static void what( int[] arr )
	{
		what( arr, 0 );
	}
	public static void main (String[] args) throws java.lang.Exception
	{
		int[] arr = new int[7];
		what( arr );
		for( int i = 0; i < arr.length; ++i )
		    System.out.println( arr[i] );
	}
}

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