| 1123 | Salary | Autumn School Contest 2001 | 4008 | 120 |
| 1297 | Palindrome | Spring School Contest 2004 | 6096 | 82 |
| 1354 | Palindrome. Again Palindrome | Spring School Contest 2005 | 3615 | 139 |
| 1635 | Mnemonics and Palindromes | USU Championship 2008 | 2040 | 195 |
| 1714 | Mnemonics and Palindromes 2 | NEERC 2009 Eastern Subregional | 107 | 3148 |
| 1737 | Mnemonics and Palindromes 3 | USU Championship 2009 | 1497 | 243 |
| 1761 | Binary Palindrome | USU Personal Contest 2010 | 323 | 1068 |
| 1954 | Five Palindromes | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 59 | 3824 |
| 1960 | Palindromes and Super Abilities | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 611 | 425 |
| 1989 | Subpalindromes | Ural FU Championship 2013 | 788 | 319 |
| 2037 | Richness of binary words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 193 | 1120 |
| 2040 | Palindromes and Super Abilities 2 | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 265 | 827 |
| 2042 | Nikita | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 45 | 4134 |
| 2044 | 31 Palindromes | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 80 | 2527 |
| 2045 | Richness of words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 499 | 447 |
