| 1123 | Salary | Autumn School Contest 2001 | 3897 | 120 |
| 1297 | Palindrome | Spring School Contest 2004 | 5889 | 82 |
| 1354 | Palindrome. Again Palindrome | Spring School Contest 2005 | 3512 | 139 |
| 1635 | Mnemonics and Palindromes | USU Championship 2008 | 1976 | 193 |
| 1714 | Mnemonics and Palindromes 2 | NEERC 2009 Eastern Subregional | 107 | 3001 |
| 1737 | Mnemonics and Palindromes 3 | USU Championship 2009 | 1457 | 238 |
| 1761 | Binary Palindrome | USU Personal Contest 2010 | 316 | 1037 |
| 1954 | Five Palindromes | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 59 | 3533 |
| 1960 | Palindromes and Super Abilities | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 558 | 429 |
| 1989 | Subpalindromes | Ural FU Championship 2013 | 751 | 308 |
| 2037 | Richness of binary words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 187 | 1047 |
| 2040 | Palindromes and Super Abilities 2 | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 260 | 764 |
| 2042 | Nikita | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 40 | 4126 |
| 2044 | 31 Palindromes | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 80 | 2292 |
| 2045 | Richness of words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 405 | 497 |
