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RP - Life, the Universe, and Everything II |
This problem tests your mathematic knowledge and your programming ability very much. Your task is to calculate the number of different Minimum Spanning Trees (MSTs) of a special undirected unweighted graph. The graph has n nodes numbered from 1 to n, and there is an edge between node i (1 ≤ i ≤ n) and node j (1 ≤ j ≤ n) if and only if 0 < |i-j| ≤ k.
Input
Multiple test cases, the number of them (≤ 8) is given in the very first line.
Each test case contains one line with two space-separated numbers k (1 ≤ k ≤ 5) and n (1 ≤ n ≤ 1015).
Output
For each test case you should output one line, the number of different MSTs of the corresponding graph modulo 65521.
Example
Input: 1 3 5 Output: 75
Added by: | Fudan University Problem Setters |
Date: | 2007-08-04 |
Time limit: | 1s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: C99 ERL JS-RHINO |
Resource: | Chinese National Olympiad in Informatics 2007,Day 2; Translated by Blue Mary |
hide comments
2009-05-20 13:10:23 Benjamin Jones
@Paul Draper Yes! Just count unique spawn trees. A spawn tree is unique iif its prufer code is unique. (hey i'm hinting you) |
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2009-04-28 10:17:00 Paul Draper
What trees are unique? Is 1-2-3 unique from 2-1-3? |
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2009-04-28 10:09:21 Paul Draper
How does a minimum spanning tree and a general tree differ in an unweighted graph? |