def subsetSum(arr, targetSum):
	n = len(arr)
	answer = [False for i in range(targetSum + 1)]
	answer[0] = True

	for i in range(n):
		for s in range(targetSum,0,-1):
			if arr[i] > s:
				continue
			if answer[s - arr[i]]:
				answer[s] = True

	return answer[targetSum], answer

ans, arr = subsetSum([5,4,9,21], 30)
print(ans)
for i in range(len(arr)):
	if arr[i]:
		print(i)