Traditional backtracking algorithm has been improved by rotating the chessboard matrix and put into solving N-queens counting problem in computer cluster.
通过对n皇后问题棋盘矩阵的旋转，改进了回溯算法，并通过计算机集群并行实现了N皇后的计数问题。
The result shows that the counting cluster and the morphological cluster show no difference, and the former one is easy to count and practise so that it provides a new method for systematic botany.
结果表明，计算分类与比较形态分类结果相一致，而且该方法计算简便，实用性好，为植物分类提供了一种新的定量分类方法。
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