import java.util.*;

public class Ex05ScaleByK2 {

	public static void scaleByK(List<Integer> list) {
		for (int i = list.size()-1; i>=0; i--) {
			Integer number = list.get(i);
			if (number <= 0) {
				list.remove(i);
			}
			for (int j = 0; j < number-1; j++) {
				list.add(i,number);
			}
		}
	}

	public static void main(String[] args) {
		Integer[] nums = { -1, -2, 0, 1, 2, 3, 4, 5, 6, 7 };
		List<Integer> list = new ArrayList( Arrays.asList(nums)  );
		System.out.println(list);
		scaleByK(list);
		System.out.println(list);
	}

}