a,b,c = map(int, input().split())
ans = []
if (b + c) % a == 0:
  ans.append((b + c) // a)
if c % a == 0 and c <= b:
  ans.append(c // a)
ans = [i for i in ans if i > 0]
print("\n".join([str(i) for i in sorted(ans)]) if len(ans) > 0 else -1)