| 1123 | Salary | Autumn School Contest 2001 | 4155 | 122 |
| 1297 | Palindrome | Spring School Contest 2004 | 6367 | 82 |
| 1354 | Palindrome. Again Palindrome | Spring School Contest 2005 | 3814 | 139 |
| 1635 | Mnemonics and Palindromes | USU Championship 2008 | 2121 | 202 |
| 1714 | Mnemonics and Palindromes 2 | NEERC 2009 Eastern Subregional | 116 | 3183 |
| 1737 | Mnemonics and Palindromes 3 | USU Championship 2009 | 1563 | 254 |
| 1761 | Binary Palindrome | USU Personal Contest 2010 | 347 | 1089 |
| 1954 | Five Palindromes | Petrozavodsk Winter 2013. Ural FU Contest | 76 | 3511 |
| 1960 | Palindromes and Super Abilities | Petrozavodsk Winter 2013. Ural FU Contest | 687 | 433 |
| 1989 | Subpalindromes | Ural FU Championship 2013 | 861 | 337 |
| 2037 | Richness of binary words | Petrozavodsk Summer 2014. Ural FU Contest | 209 | 1221 |
| 2040 | Palindromes and Super Abilities 2 | Petrozavodsk Summer 2014. Ural FU Contest | 302 | 857 |
| 2042 | Nikita | Petrozavodsk Summer 2014. Ural FU Contest | 71 | 3300 |
| 2044 | 31 Palindromes | Petrozavodsk Summer 2014. Ural FU Contest | 98 | 2475 |
| 2045 | Richness of words | Petrozavodsk Summer 2014. Ural FU Contest | 552 | 476 |