| 1123 | Salary | Autumn School Contest 2001 | 4072 | 121 |
| 1297 | Palindrome | Spring School Contest 2004 | 6232 | 82 |
| 1354 | Palindrome. Again Palindrome | Spring School Contest 2005 | 3699 | 139 |
| 1635 | Mnemonics and Palindromes | USU Championship 2008 | 2073 | 198 |
| 1714 | Mnemonics and Palindromes 2 | NEERC 2009 Eastern Subregional | 109 | 3209 |
| 1737 | Mnemonics and Palindromes 3 | USU Championship 2009 | 1517 | 249 |
| 1761 | Binary Palindrome | USU Personal Contest 2010 | 329 | 1089 |
| 1954 | Five Palindromes | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 61 | 3938 |
| 1960 | Palindromes and Super Abilities | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 638 | 432 |
| 1989 | Subpalindromes | Ural FU Championship 2013 | 813 | 329 |
| 2037 | Richness of binary words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 201 | 1156 |
| 2040 | Palindromes and Super Abilities 2 | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 274 | 859 |
| 2042 | Nikita | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 51 | 3998 |
| 2044 | 31 Palindromes | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 84 | 2595 |
| 2045 | Richness of words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 519 | 461 |
