/* 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
{
	public static void main (String[] args) throws java.lang.Exception
	{
		int[] arr = {0,1,2,3,4,5,6};
 
for(int i=0;i<arr.length-1;i++){
  if(arr[i]==0){
    for(int j=i+1;j<arr.length-1;j++){
    arr[j+1]=arr[j];
     }
     arr[i+1]=0;
     i++;
   }
 
}
System.out.println(Arrays.toString(arr));
	}
}

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