| Digraph description of k-interchange technique for optimization over permutations and adaptive algorithm system Recent countries visiting this post |  |
 | 8 | United States |
 | 2 | Russian Federation |
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| Digraph description of k-interchange technique for optimization over permutations and adaptive algorithm system Recent countries visiting this post | |
| 8 | United States |
| 2 | Russian Federation |
| 1 | |
| 1 | Turkey |