| Two new methods for constructing double-ended priority queues from priority queues Recent countries visiting this post |  |
 | 7 | United States |
 | 1 | Sweden |
 | 1 | Russian Federation |
| Two new methods for constructing double-ended priority queues from priority queues Recent countries visiting this post | |
| 7 | United States |
| 1 | Sweden |
| 1 | Russian Federation |