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Root
580 - Critical Mass
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| Total Submissions | Users that tried it | Users that solved it |
| 7990 | 2827 | 2583 |
| Top 20 | ||||||
| Ranking | Submission | User | Run Time | Language | Submission Date | |
| 1 | 36667 | Enno Brehm | 0.000 | C++ | 1998-10-28 12:43:44 | |
| 2 | 48516 | Pavel Kos | 0.000 | ANSI C | 1999-01-19 11:03:52 | |
| 3 | 48714 | Josef Pelikan | 0.000 | ANSI C | 1999-01-20 22:31:25 | |
| 4 | 48801 | Peter Norton | 0.000 | C++ | 1999-01-21 09:26:58 | |
| 5 | 49276 | Dolphin | 0.000 | C++ | 1999-01-23 20:20:26 | |
| 6 | 49416 | Matrix Reloaded | 0.000 | ANSI C | 1999-01-24 10:57:01 | |
| 7 | 50626 | Paul Shelley | 0.000 | ANSI C | 1999-02-01 16:48:13 | |
| 8 | 51669 | Lawrence Kirby | 0.000 | ANSI C | 1999-02-09 20:28:51 | |
| 9 | 52679 | Ingemar Henriksson | 0.000 | ANSI C | 1999-02-13 01:45:08 | |
| 10 | 53224 | Dennis Chia | 0.000 | C++ | 1999-02-15 05:16:50 | |
| 11 | 53238 | Andy Kurnia (1998) | 0.000 | C++ | 1999-02-15 06:50:22 | |
| 12 | 53313 | NUS-1998 Team | 0.000 | C++ | 1999-02-15 12:48:23 | |
| 13 | 54834 | Gurmeet Singh Manku | 0.000 | ANSI C | 1999-02-21 23:44:44 | |
| 14 | 61179 | Leonid Volkov | 0.000 | C++ | 1999-04-02 13:44:33 | |
| 15 | 66677 | Alvaro | 0.000 | ANSI C | 1999-04-26 19:56:37 | |
| 16 | 66726 | Wanjun Li | 0.000 | ANSI C | 1999-04-27 05:36:55 | |
| 17 | 71228 | Kelvin Lim | 0.000 | ANSI C | 1999-05-23 14:49:25 | |
| 18 | 71544 | Arturs Zogla | 0.000 | ANSI C | 1999-05-25 18:53:02 | |
| 19 | 73521 | NeedGem Liu | 0.000 | ANSI C | 1999-06-08 23:27:45 | |
| 20 | 74724 | Felipe Pereira | 0.000 | ANSI C | 1999-06-17 03:46:10 | |