| On Sorting Permutations by Double-Cut-and-Joins Recent countries visiting this post |  |
 | 11 | United States |
 | 1 | |
 | 1 | Russian Federation |
 | 1 | Germany |
| On Sorting Permutations by Double-Cut-and-Joins Recent countries visiting this post | |
| 11 | United States |
| 1 | |
| 1 | Russian Federation |
| 1 | Germany |