backcommit and switch to min modulus
Merge branch 'master' of https://github.com/cevian/disttopk
Merge branch 'master' of https://github.com/cevian/disttopk
Merge branch 'master' of https://github.com/cevian/disttopk
backcommit
Merge branch 'master' of https://github.com/cevian/disttopk
Merge branch 'master' of https://github.com/cevian/disttopk
Merge branch 'master' of https://github.com/cevian/disttopk
Merge branch 'master' of https://github.com/cevian/disttopk
fixing ucb negative ids