v1 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
v2 = [11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
v3 = [None]*20
v3[0::2] = v1
v3[1::2] = v2
print(v3)
djEgPSBbMCwgMSwgMiwgMywgNCwgNSwgNiwgNywgOCwgOV0KdjIgPSBbMTEsIDEyLCAxMywgMTQsIDE1LCAxNiwgMTcsIDE4LCAxOSwgMjBdCnYzID0gW05vbmVdKjIwCgp2M1swOjoyXSA9IHYxCnYzWzE6OjJdID0gdjIKCnByaW50KHYzKQ==
[0, 11, 1, 12, 2, 13, 3, 14, 4, 15, 5, 16, 6, 17, 7, 18, 8, 19, 9, 20]