void () { int[][] change = buildChange(new int[]{1}, new int[]{1}); checkChange(change, new int[]{0}, new int[]{0}); change = buildChange(new int[]{5, 1}, new int[]{1}); checkChange(change, new int[]{1}, new int[]{0}); change = buildChange(new int[]{1}, new int[]{2, 1}); checkChange(change, new int[]{0}, new int[]{1}); change = buildChange(new int[]{1}, new int[]{1, 4}); checkChange(change, new int[]{0}, new int[]{0}); change = buildChange(new int[]{1, 3}, new int[]{1}); checkChange(change, new int[]{0}, new int[]{0}); change = buildChange(new int[]{5, 1, 3}, new int[]{2, 1, 4}); checkChange(change, new int[]{1}, new int[]{1}); }