"""
x = 666
a = 0
b = 0
while (x > 0):
  a = a + 1
  print(f"a={a}, b={b}, x={x}, x%10={x%10}")
  if b <= x%10:
    b = x % 10
    x = x // 10


  if (a > 5):
    exit()
print(a)
print(b)


i =5
while (i >= 3):
  print("hello")
  i -= 1


i = 3
while (i >= 2):
  print("hello")
  i -= 1
"""

from tkinter import N


z = 30
for n in range(10):
  if n < 0:
    z = z - 2 * n
  else:
    z = n - z

  print(z)