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Here are the solutions to the Hacker Cup 2017 Final Round problems. If you had a rejected solution and want to find out where you went wrong, read on and download the official input and output!
Input / Output / Solutions: https://www.dropbox.com/sh/cdb65zcq167grl5/AAB-uOTV62fPHcHuhh1hxSWVa?dl=0
The problems in this round were written by Jacob Plachta.
Fox Patrols
Let's begin by considering what determines whether or not a Northern skyline N[1..C] is "compatible" with a Western skyline W[1..R], meaning that there exists at least one forest which has that pair of skylines. A necessary condition is t...
Facebook Hacker Cup was live.
June 14

Live reveal of the winners of the 2017 Facebook Hacker Cup!

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Finals are done! We're calculating the results and giving our finalists a little break before reviewing the results.

T-minus 20 minutes before the Hacker Cup Finals 2017 Results Livestream! See you there!

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There's just under one hour remaining in the 2017 Facebook Hacker Cup Finals at Facebook Seattle. Will the leader be the same in 60 minutes? Tune in for a live reveal shortly after the end of the contest to find out!

https://www.facebook.com/hackercup/scoreboard/

The Facebook Hacker Cup is an annual worldwide programming competition where hackers compete against each other for fame, fortune, glory and a shot at the coveted Hacker Cup. Want to compete? checkout our FAQ section for complete details.

About an hour left to go...

Are you following along? Be sure to come back to this page at 6pm PST to join us for livestream of the results!

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Let the coding begin! Good luck to the finalists!

To follow along, visit: https://www.facebook.com/hacke…/scoreboard/1799632126966939/

facebook.com

The 2017 Facebook Hacker Cup onsite final round begins in just a few hours at 1:30pm PDT!

Follow along on the official scoreboard when the round starts:

https://www.facebook.com/hacke…/scoreboard/1799632126966939/

...

See the start time in your time zone here:

https://www.timeanddate.com/worldclock/fixedtime.html…

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The Facebook Hacker Cup is an annual worldwide programming competition where hackers compete against each other for fame, fortune, glory and a shot at the coveted Hacker Cup. Want to compete? checkout our FAQ section for complete details.

The Finals Are Here!!

Its a beautiful morning in Seattle and the finalists are on their way to the Facebook Seattle Office. Tune in at 6pm on this page to watch the Livestream of the Results at 6pm PST.

Will Makoto Soejima reclaim his seat as current champion or will past victors Roman Andreev, Gennady Korotkevich and Petr Mitrichiev take the win? Will we meet a new winner?

...

Check back in at 6pm to find out!

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Here are the solutions to the Hacker Cup 2017 Round 3 problems. If you had a rejected solution and want to find out where you went wrong, read on and download the official input and output!
Input / Output / Solutions: https://www.dropbox.com/sh/us7vupgrgd6yfni/AAD0cLki-aHIWQE42MAM270ja?dl=0
Broken Bits was co-written by Wesley May and Jacob Plachta. The remaining problems in this round were written by Jacob Plachta.
Salient Strings
Let S[i] be the index such that P[S[i]] = i. For each i from 2 to N, it’s required that the suffix starting at S[i] is lexicographically larger than the one starting at...

Round 3 is now over. Thanks to everybody who participated!

The top 25 contestants will be invited to the onsite finals at Facebook Seattle. Look out for your invitations coming soon.

If any of the top 25 decline or are unable to come, we will extend invitations to the next eligible contestants.

Round 3 of the 2017 Facebook Hacker Cup starts in less than 12 hours!

The round starts at 10:00am PST (6:00pm UTC) and can be found here: https://www.facebook.com/hackercup/round

The top 25 contestants will be invited to the onsite finals at the Facebook Seattle office!

Open to all participants who finished in the top 200 during Round 2. The top 25 competitors in this round will advance to the Facebook Hacker Cup Finals at Facebook Seattle!

https://www.facebook.com/hackercup/round

JAN28
Sat 10:00 AM PSThttps://www.facebook.com/hackercup/round
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We're excited to announce that the 2017 Facebook Hacker Cup Onsite Finals will take place at Facebook Seattle, and the exact date will be announced shortly! The top 25 finishers from Round 3, which takes place in just a few days, will advance to the finals.

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Here are the solutions to the Hacker Cup 2017 Round 2 problems. If you had a rejected solution and want to find out where you went wrong, read on and download the official input and output!
Input / Output / Solutions: https://www.dropbox.com/sh/yw59pefnrzj2wzw/AABvVi7uk3Q_NdbL3p4yaVhda?dl=0
The problems in this round were written by Jacob Plachta.
Subtle Sabotage
In order for the shortest path from the top-left to the bottom-right to be longer than N + M - 2, at least one upwards or leftwards move must be forced. Let’s say without loss of generality that the grid is as at least tall as it is wid...

Round 2 of the 2017 Facebook Hacker Cup is over! Thanks to everybody who participated!

The top 200 contestants will advance to Round 3, which will be held on Sat. Jan. 28 at 10am PST (6pm UTC).

The top 500 contestants will receive a Hacker Cup T-shirt. Make sure that your details are up-to-date here: www.facebook.com/hackercup/register