rob seeding thing

assume 8 groups of 16 people leading to a 8-person final bracket

seeds are 1-128

Group A is seeds 1-16
Group B is seeds 17-32
etc.

1->1
2->17
3->33
4->..
...
8->113
...
9->2
10->18
11->34
...
128->128

seed mod 8 = group (1-8:A-H)
(remainder-1)*16 = modifier


x=(8*y)+z  y is 1-16, z is 1-8

2 = (8*0)+2
seed = ((2-1)*16)+(0+1)


11 = (8*1)+3
seed = ((3-1)*16)+(1+1) = 32+2 = 34

new = (((seed mod 8)-1)*16) + (floor(seed/8)+1)

new = (((seed mod [#groups])-1) * [#people per group]) + (floor(seed/[#groups])+1)