| 1123 | Salary | Autumn School Contest 2001 | 4042 | 121 |
| 1297 | Palindrome | Spring School Contest 2004 | 6176 | 81 |
| 1354 | Palindrome. Again Palindrome | Spring School Contest 2005 | 3670 | 138 |
| 1635 | Mnemonics and Palindromes | USU Championship 2008 | 2059 | 196 |
| 1714 | Mnemonics and Palindromes 2 | NEERC 2009 Eastern Subregional | 110 | 3127 |
| 1737 | Mnemonics and Palindromes 3 | USU Championship 2009 | 1507 | 246 |
| 1761 | Binary Palindrome | USU Personal Contest 2010 | 325 | 1082 |
| 1954 | Five Palindromes | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 62 | 3776 |
| 1960 | Palindromes and Super Abilities | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 629 | 425 |
| 1989 | Subpalindromes | Ural FU Championship 2013 | 801 | 324 |
| 2037 | Richness of binary words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 196 | 1145 |
| 2040 | Palindromes and Super Abilities 2 | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 269 | 845 |
| 2042 | Nikita | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 49 | 3996 |
| 2044 | 31 Palindromes | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 83 | 2535 |
| 2045 | Richness of words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 510 | 453 |