{"shas":[["e14f2b4f7b346a738a41d39f4a7e21b1a0e3ce58","001cd03e61cd91b94ed721816d8a9e5c9037b1b0@gmail.com","simplified the spec of Figure 3 from Knuth","David Grayson"],["09353ce35e919b384d3823f51643d14a3755791a","001cd03e61cd91b94ed721816d8a9e5c9037b1b0@gmail.com","Cleaned up tmphax from find_exact_cover, started working on find_exact_cover_non_recursive.","David Grayson"],["f7f8f1d934104d2af53048291a7e7baec0277464","001cd03e61cd91b94ed721816d8a9e5c9037b1b0@gmail.com","Successfully changed find_exact_cover to be non-recursive.  Kept the old version around because some people might like it better.","David Grayson"],["2b57c9a3b0d942331074c2c32e782e042c2db784","001cd03e61cd91b94ed721816d8a9e5c9037b1b0@gmail.com","Added comments about how the non-recursive algorithm works.","David Grayson"],["1edc9d21265612a4deff06814bf1df65b46e7a2d","001cd03e61cd91b94ed721816d8a9e5c9037b1b0@gmail.com","Added comments.","David Grayson"]],"ref":"refs/heads/master","size":5,"head":"1edc9d21265612a4deff06814bf1df65b46e7a2d","push_id":41645077}