2008年浙江省高中数学竞赛最后一道附加题:将3k(k 为正整数)个石子分成5堆.如果通过每次从其中的3堆中各取走一个石子,而最后取完,那么称这样的分法是和谐的.试给出和谐分法的充分必要条件,并且加以证明.1 试题解析分法是和谐的充分必要条件是最多一堆石子的个数不 The last additional question of the 2008 Zhejiang Provincial High School Mathematics Contest: Divide 3k (k is a positive integer) stones into 5 piles. If you take away one stone from each of the 3 piles, and then take it last, then call this. The method of division is harmonious. Try to give a sufficient and necessary condition for the harmonious division method and prove it. 1 The sufficient and necessary condition for the analysis of the test question is that the maximum number of stones is not