There are 26 men's singles table tennis players. How to arrange them?

Look at the picture ~ ~?

The 1 seed player is fixed at the 1 position, and the No.2 seed player is at the tail of the lower half (position 26). No.3 and No.4 seed players will draw lots to decide who is in the position of 13 or 14 in the upper and lower half. If there are eight seeded players, they should draw lots to enter the remaining first-round bye positions.