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Root
12379 - Central Post Office
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| Total Submissions | Users that tried it | Users that solved it |
| 1079 | 223 | 194 |
| Top 20 | ||||||
| Ranking | Submission | User | Run Time | Language | Submission Date | |
| 1 | 19861550 | feodorv | 0.010 | ANSI C | 2017-08-15 19:23:34 | |
| 2 | 26494719 | joshua | 0.020 | C++ | 2021-06-18 08:39:13 | |
| 3 | 11010579 | Noob Jr | 0.036 | C++ | 2012-12-10 02:14:38 | |
| 4 | 18263802 | Morass | 0.040 | C++11 | 2016-10-27 01:08:06 | |
| 5 | 13190223 | Nguyen Khac Tung | 0.052 | C++ | 2014-02-22 07:30:00 | |
| 6 | 30737483 | 赵子龙 | 0.060 | C++11 | 2025-10-18 20:06:58 | |
| 7 | 30926481 | Matt C. | 0.060 | C++ | 2026-01-13 09:50:11 | |
| 8 | 31087316 | nany625 | 0.060 | C++ | 2026-04-21 04:40:13 | |
| 9 | 9536861 | Arthur Alem | 0.064 | C++ | 2011-12-05 22:06:32 | |
| 10 | 23956044 | justin lim | 0.070 | C++11 | 2019-09-24 14:12:05 | |
| 11 | 25358021 | Alif Al Hasan | 0.070 | C++11 | 2020-08-11 08:43:59 | |
| 12 | 25375533 | Cynthia Du | 0.070 | C++ | 2020-08-15 20:32:35 | |
| 13 | 25445110 | Thiago Felipe Bastos da Silva | 0.070 | C++11 | 2020-09-02 23:23:23 | |
| 14 | 25751716 | 李彦宏 | 0.070 | C++11 | 2020-11-23 02:29:04 | |
| 15 | 27002907 | Teerapat Jenrungrot | 0.070 | C++11 | 2021-11-28 04:05:19 | |
| 16 | 30737576 | 刘强东 | 0.070 | C++11 | 2025-10-18 21:58:14 | |
| 17 | 30740799 | 黄汉升 | 0.070 | C++11 | 2025-10-20 01:37:57 | |
| 18 | 30748489 | 张翼德 | 0.070 | C++11 | 2025-10-23 01:05:27 | |
| 19 | 11075440 | nehc | 0.072 | ANSI C | 2012-12-26 14:07:00 | |
| 20 | 13223001 | Marco | 0.072 | C++ | 2014-02-26 23:20:03 | |