Solve 5 problems on Combinatorics topic.
| # | User | Unlock date | Country | XP |
|---|---|---|---|---|
| 6 | treetey | Aug. 18, 2012, 9:03 p.m. |
|
29 |
| 5 | chern_character | Aug. 17, 2012, 8:20 p.m. |
|
48 |
| 4 | Phillip Compeau | Aug. 15, 2012, 11:16 a.m. |
|
29 |
| 3 | Andrey Balandin | Aug. 12, 2012, 10:40 a.m. |
|
32 |
| 2 | Kurpilyansky Eugene | Aug. 3, 2012, 1:45 p.m. | 20 | |
| 1 | Mikhail Dvorkin | July 4, 2012, 4:02 p.m. |
|
20 |
