| 1123 | Salary | Autumn School Contest 2001 | 3690 | 120 |
| 1297 | Palindrome | Spring School Contest 2004 | 5324 | 86 |
| 1354 | Palindrome. Again Palindrome | Spring School Contest 2005 | 3085 | 150 |
| 1635 | Mnemonics and Palindromes | USU Championship 2008 | 1759 | 199 |
| 1714 | Mnemonics and Palindromes 2 | NEERC 2009 Eastern Subregional | 102 | 2845 |
| 1737 | Mnemonics and Palindromes 3 | USU Championship 2009 | 1360 | 231 |
| 1761 | Binary Palindrome | USU Personal Contest 2010 | 296 | 996 |
| 1954 | Five Palindromes | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 51 | 3376 |
| 1960 | Palindromes and Super Abilities | Petrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection | 453 | 445 |
| 1989 | Subpalindromes | Ural FU Championship 2013 | 655 | 295 |
| 2037 | Richness of binary words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 159 | 986 |
| 2040 | Palindromes and Super Abilities 2 | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 226 | 706 |
| 2042 | Nikita | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 25 | 4760 |
| 2044 | 31 Palindromes | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 63 | 2282 |
| 2045 | Richness of words | Petrozavodsk Summer 2014. Ural FU Dandelion Contest | 330 | 490 |
