| 1123 | Salary | Autumn School Contest 2001 | 4119 | 122 |
| 1297 | Palindrome | Spring School Contest 2004 | 6300 | 82 |
| 1354 | Palindrome. Again Palindrome | Spring School Contest 2005 | 3765 | 138 |
| 1635 | Mnemonics and Palindromes | USU Championship 2008 | 2102 | 200 |
| 1714 | Mnemonics and Palindromes 2 | NEERC 2009 Eastern Subregional | 112 | 3216 |
| 1737 | Mnemonics and Palindromes 3 | USU Championship 2009 | 1540 | 252 |
| 1761 | Binary Palindrome | USU Personal Contest 2010 | 339 | 1089 |
| 1954 | Five Palindromes | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 67 | 3790 |
| 1960 | Palindromes and Super Abilities | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 662 | 434 |
| 1989 | Subpalindromes | Ural FU Championship 2013 | 849 | 330 |
| 2037 | Richness of binary words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 205 | 1194 |
| 2040 | Palindromes and Super Abilities 2 | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 287 | 864 |
| 2042 | Nikita | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 58 | 3775 |
| 2044 | 31 Palindromes | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 89 | 2593 |
| 2045 | Richness of words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 540 | 467 |
