import java.util.Arrays;

public class Assess4_13_Sample{

  public static int[] keep(int[] arr1, int[] arr2){
    int [] result = new int[2];
    return result;
  }

  public static int[] cleanResult(int[] array){
    return Arrays.stream(array).filter(num -> num != 0).toArray();    
  }

  public static void main(String[] args){

    int [] arr1a = {1};
    int [] arr1b = {0};
    int [] result1 = {1};
    System.out.println("test1: " + Arrays.equals(cleanResult(keep(arr1a, arr1b)), result1));
    int [] arr2a = {1};
    int [] arr2b = {1};
    int [] result2 = {};
    System.out.println("test2: " + Arrays.equals(cleanResult(keep(arr2a, arr2b)), result2));
    int [] arr3a = {};
    int [] arr3b = {1};
    int [] result3 = {};    
    System.out.println("test2: " + Arrays.equals(cleanResult(keep(arr3a, arr3b)), result3));
    int [] arr4a = {1};
    int [] arr4b = {};
    int [] result4 = {1};
    System.out.println("test4: " + Arrays.equals(cleanResult(keep(arr4a, arr4b)), result4));
    int [] arr5a = {1, 2, 1, 4, 5, 3, 7};
    int [] arr5b = {1, 3};
    int [] result5 = {2, 4, 5, 7};
    System.out.println("test4: " + Arrays.equals(cleanResult(keep(arr5a, arr5b)), result5));
  }

}