Do EFX allocations always exist for additive valuations?
Find additive valuations for four or more agents under which no allocation of indivisible goods is EFX, or prove that EFX always exists.
比较改动
选两个分支看看改了什么,再发起 PR 把工作带过去。
选两个不同的分支
PR 可以从任何一个分支合入任何另一个分支。