| 1123 | Salary | Autumn School Contest 2001 | 3991 | 120 |
| 1297 | Palindrome | Spring School Contest 2004 | 6042 | 82 |
| 1354 | Palindrome. Again Palindrome | Spring School Contest 2005 | 3593 | 139 |
| 1635 | Mnemonics and Palindromes | USU Championship 2008 | 2029 | 194 |
| 1714 | Mnemonics and Palindromes 2 | NEERC 2009 Eastern Subregional | 107 | 3115 |
| 1737 | Mnemonics and Palindromes 3 | USU Championship 2009 | 1488 | 242 |
| 1761 | Binary Palindrome | USU Personal Contest 2010 | 321 | 1062 |
| 1954 | Five Palindromes | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 59 | 3758 |
| 1960 | Palindromes and Super Abilities | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 606 | 421 |
| 1989 | Subpalindromes | Ural FU Championship 2013 | 775 | 319 |
| 2037 | Richness of binary words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 190 | 1113 |
| 2040 | Palindromes and Super Abilities 2 | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 265 | 809 |
| 2042 | Nikita | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 42 | 4281 |
| 2044 | 31 Palindromes | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 80 | 2473 |
| 2045 | Richness of words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 495 | 441 |
