| 1123 | Salary | Autumn School Contest 2001 | 4168 | 122 |
| 1297 | Palindrome | Spring School Contest 2004 | 6388 | 82 |
| 1354 | Palindrome. Again Palindrome | Spring School Contest 2005 | 3827 | 138 |
| 1635 | Mnemonics and Palindromes | USU Championship 2008 | 2132 | 202 |
| 1714 | Mnemonics and Palindromes 2 | NEERC 2009 Eastern Subregional | 119 | 3122 |
| 1737 | Mnemonics and Palindromes 3 | USU Championship 2009 | 1570 | 254 |
| 1761 | Binary Palindrome | USU Personal Contest 2010 | 348 | 1091 |
| 1954 | Five Palindromes | Petrozavodsk Winter 2013. Ural FU Contest | 78 | 3454 |
| 1960 | Palindromes and Super Abilities | Petrozavodsk Winter 2013. Ural FU Contest | 690 | 434 |
| 1989 | Subpalindromes | Ural FU Championship 2013 | 865 | 338 |
| 2037 | Richness of binary words | Petrozavodsk Summer 2014. Ural FU Contest | 210 | 1225 |
| 2040 | Palindromes and Super Abilities 2 | Petrozavodsk Summer 2014. Ural FU Contest | 303 | 861 |
| 2042 | Nikita | Petrozavodsk Summer 2014. Ural FU Contest | 73 | 3246 |
| 2044 | 31 Palindromes | Petrozavodsk Summer 2014. Ural FU Contest | 101 | 2427 |
| 2045 | Richness of words | Petrozavodsk Summer 2014. Ural FU Contest | 554 | 478 |