→ About Contest
The 2009 ACM-ICPC East Central North America Regional Programming Contest (ACM-ICPC ECNA RPC) was held on Saturday October 31, 2009. We had 115 teams drawn from 60 colleges and universities throughout western Pennsylvania, Ohio, Michigan, eastern Ontario, and Indiana (excluding the Greater Chicago Metropolitan Area).
→ Virtual participation
Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.
→ Practice?
Want to solve the contest problems after the official contest ends? Just register for practice and you will be able to submit solutions.
→ Status filter
→ Contest materials
Problem A - Arithmetically Challenged
Contest status
| # | When | Who | Problem | Lang | Verdict | Time | Memory |
|---|---|---|---|---|---|---|---|
| 10440847 | Mar/25/2015 16:36 |
 Victors (U of Michigan) |
A - Arithmetically Challenged | Unknown | Accepted | 0 ms | 0 KB |
| 10440903 | Mar/25/2015 16:36 |
Dragons (Carnegie Mellon) |
A - Arithmetically Challenged | Unknown | Accepted | 0 ms | 0 KB |
| 10440912 | Mar/25/2015 16:36 |
Waterloo Black (U Waterloo) |
A - Arithmetically Challenged | Unknown | Accepted | 0 ms | 0 KB |
| 10440913 | Mar/25/2015 16:36 |
Purdue Cheburashka (Purdue U) |
A - Arithmetically Challenged | Unknown | Accepted | 0 ms | 0 KB |
| 10440933 | Mar/25/2015 16:36 |
Waterloo Gold (U Waterloo) |
A - Arithmetically Challenged | Unknown | Accepted | 0 ms | 0 KB |
| 10440987 | Mar/25/2015 16:36 |
Cedarville Gold (Cedarville Univ) |
A - Arithmetically Challenged | Unknown | Accepted | 0 ms | 0 KB |
| 10440993 | Mar/25/2015 16:36 |
Buckeye Alpha (Ohio State U.) |
A - Arithmetically Challenged | Unknown | Accepted | 0 ms | 0 KB |
| 10441011 | Mar/25/2015 16:36 |
Tartans (Carnegie Mellon) |
A - Arithmetically Challenged | Unknown | Accepted | 0 ms | 0 KB |
| 10441070 | Mar/25/2015 16:36 |
Cardinals (Carnegie Mellon) |
A - Arithmetically Challenged | Unknown | Accepted | 0 ms | 0 KB |
| 10441125 | Mar/25/2015 16:36 |
Waterloo Red (U Waterloo) |
A - Arithmetically Challenged | Unknown | Accepted | 0 ms | 0 KB |
| 10441137 | Mar/25/2015 16:36 |
Bits && Bytes (GCC) |
A - Arithmetically Challenged | Unknown | Accepted | 0 ms | 0 KB |
| 10441270 | Mar/25/2015 16:36 |
Purdue Griffins (Purdue U) |
A - Arithmetically Challenged | Unknown | Accepted | 0 ms | 0 KB |
| 10441287 | Mar/25/2015 16:36 |
Gnu Yorkers (York U.) |
A - Arithmetically Challenged | Unknown | Accepted | 0 ms | 0 KB |
| 10441428 | Mar/25/2015 16:36 |
ACM CADO MADIDE () |
A - Arithmetically Challenged | Unknown | Accepted | 0 ms | 0 KB |
| 18027131 | May/22/2016 09:59 | nickluo | A - Arithmetically Challenged | GNU C++ | Accepted | 31 ms | 2000 KB |
| 89335503 | Aug/08/2020 15:52 | practise_makes_perfect | A - Arithmetically Challenged | GNU C++11 | Accepted | 31 ms | 3800 KB |
| 129502614 | Sep/21/2021 17:09 | vjudge2 | A - Arithmetically Challenged | C++14 (GCC 6-32) | Accepted | 30 ms | 3800 KB |
| 328996947 | Jul/15/2025 07:48 | bardeen | A - Arithmetically Challenged | C++17 (GCC 7-32) | Accepted | 46 ms | 0 KB |
| 65131672 | Nov/16/2019 06:45 | vjudge5 | A - Arithmetically Challenged | GNU C++11 | Accepted | 30 ms | 0 KB |
| 27612379 | Jun/06/2017 14:41 | vjudge2 | A - Arithmetically Challenged | GNU C++ | Accepted | 31 ms | 0 KB |
| 34195554 | Jan/15/2018 14:47 | Artistic_Fantasy | A - Arithmetically Challenged | C++14 (GCC 6-32) | Accepted | 0 ms | 2000 KB |
| 328844308 | Jul/14/2025 06:28 | chenmohan201068 | A - Arithmetically Challenged | C++23 (GCC 14-64, msys2) | Accepted | 46 ms | 0 KB |
| 129502561 | Sep/21/2021 17:09 | vjudge1 | A - Arithmetically Challenged | C++14 (GCC 6-32) | Accepted | 31 ms | 3800 KB |
| 328861373 | Jul/14/2025 10:02 | hgzx | A - Arithmetically Challenged | C++17 (GCC 7-32) | Accepted | 46 ms | 0 KB |
| 18054350 | May/24/2016 14:32 | vjudge2 | A - Arithmetically Challenged | GNU C++ | Accepted | 15 ms | 2100 KB |
| 30236873 | Sep/10/2017 05:58 | cnnfls_csy | A - Arithmetically Challenged | C++14 (GCC 6-32) | Accepted | 15 ms | 200 KB |
| 144631202 | Jan/31/2022 12:03 | SoiMae | A - Arithmetically Challenged | C++14 (GCC 6-32) | Accepted | 15 ms | 200 KB |
| 34210295 | Jan/16/2018 04:17 | the_silliest | A - Arithmetically Challenged | C++14 (GCC 6-32) | Accepted | 30 ms | 2000 KB |
| 89338732 | Aug/08/2020 16:38 | Charles_chu | A - Arithmetically Challenged | C++17 (GCC 7-32) | Accepted | 30 ms | 3800 KB |
| 18054357 | May/24/2016 14:32 | Denverjin | A - Arithmetically Challenged | GNU C++ | Accepted | 15 ms | 2000 KB |
| 18217116 | Jun/02/2016 16:12 | NEUQ_VJ | A - Arithmetically Challenged | GNU C++ | Accepted | 15 ms | 2100 KB |
| 18217131 | Jun/02/2016 16:13 | NEUQ_VJ | A - Arithmetically Challenged | GNU C++ | Accepted | 15 ms | 2100 KB |
| 19222866 | Jul/19/2016 05:41 | AnnieCai | A - Arithmetically Challenged | GNU C++ | Accepted | 15 ms | 0 KB |
| 18117246 | May/27/2016 14:37 | AnnieCai | A - Arithmetically Challenged | GNU C++ | Accepted | 15 ms | 2000 KB |
| 18184399 | Jun/01/2016 18:13 | DrIsaac | A - Arithmetically Challenged | GNU C++ | Accepted | 15 ms | 2100 KB |
| 18184423 | Jun/01/2016 18:15 | DrIsaac | A - Arithmetically Challenged | GNU C++ | Accepted | 15 ms | 2100 KB |
| 16690033 | Mar/13/2016 13:40 | xwchow | A - Arithmetically Challenged | GNU C++11 | Accepted | 15 ms | 0 KB |
| 89336867 | Aug/08/2020 16:12 | alex.liu | A - Arithmetically Challenged | GNU C++11 | Accepted | 30 ms | 3800 KB |
| 18131774 | May/28/2016 15:54 | vjudge1 | A - Arithmetically Challenged | GNU C++11 | Accepted | 15 ms | 2000 KB |
| 21966497 | Nov/01/2016 15:09 | AnnieCai | A - Arithmetically Challenged | GNU C++ | Accepted | 15 ms | 0 KB |
| 19222446 | Jul/19/2016 05:09 | Pollyanna | A - Arithmetically Challenged | GNU C++ | Accepted | 0 ms | 0 KB |
| 30239062 | Sep/10/2017 09:41 | vjudge1 | A - Arithmetically Challenged | GNU C++ | Accepted | 15 ms | 0 KB |
| 19222922 | Jul/19/2016 05:46 | Denverjin | A - Arithmetically Challenged | GNU C++ | Accepted | 15 ms | 0 KB |
| 18131787 | May/28/2016 15:55 | hwy2004 | A - Arithmetically Challenged | GNU C++ | Accepted | 15 ms | 2000 KB |
| 328851186 | Jul/14/2025 08:17 | volcanologist | A - Arithmetically Challenged | C++20 (GCC 13-64) | Accepted | 46 ms | 0 KB |
| 18033006 | May/22/2016 17:56 | zhuky.RLG | A - Arithmetically Challenged | GNU C++ | Accepted | 0 ms | 2000 KB |
| 18025484 | May/22/2016 06:12 | vjudge4 | A - Arithmetically Challenged | GNU C++ | Accepted | 0 ms | 2100 KB |
| 18054235 | May/24/2016 14:21 | vjudge5 | A - Arithmetically Challenged | GNU C++ | Accepted | 15 ms | 2100 KB |
| 11630559 | Jun/18/2015 13:20 | KrK# | A - Arithmetically Challenged | GNU C++ | Accepted | 15 ms | 0 KB |
| 214517172 | Jul/19/2023 19:50 | ckbro | A - Arithmetically Challenged | C++17 (GCC 7-32) | Accepted | 15 ms | 200 KB |
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