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求大神交这道题目

Posted by 13310320622 at 2014-03-06 14:34:09
Description
一个实验室有N个放化学品的试管,排列在一条直线上。如果连续M个试管中放入药品,则会发生爆炸,于是,在某些试管中可能不放药品。 
任务:对于给定的N和M,求不发生爆炸的放置药品的方案总数 
Input
第一行是一个正整数L,代表输入数据的组数 
接下来L行,每行有两个正整数N,M( 1<N<32,2≤M≤5) 
Output
输出L行,每行只有一个正整数S,表示对应输入数据的方案总数。

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