| 1123 | Salary | Autumn School Contest 2001 | 4096 | 121 |
| 1297 | Palindrome | Spring School Contest 2004 | 6255 | 82 |
| 1354 | Palindrome. Again Palindrome | Spring School Contest 2005 | 3740 | 138 |
| 1635 | Mnemonics and Palindromes | USU Championship 2008 | 2088 | 198 |
| 1714 | Mnemonics and Palindromes 2 | NEERC 2009 Eastern Subregional | 111 | 3189 |
| 1737 | Mnemonics and Palindromes 3 | USU Championship 2009 | 1528 | 250 |
| 1761 | Binary Palindrome | USU Personal Contest 2010 | 332 | 1092 |
| 1954 | Five Palindromes | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 63 | 3894 |
| 1960 | Palindromes and Super Abilities | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 651 | 430 |
| 1989 | Subpalindromes | Ural FU Championship 2013 | 824 | 330 |
| 2037 | Richness of binary words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 203 | 1168 |
| 2040 | Palindromes and Super Abilities 2 | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 278 | 864 |
| 2042 | Nikita | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 57 | 3713 |
| 2044 | 31 Palindromes | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 85 | 2619 |
| 2045 | Richness of words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 528 | 462 |
