八皇后问题的拓展，n皇后问题的深度优先算法，可以把结果以文件形式输出。N<=20-eight of the Queen's expansion, n depth of the Queen's priority algorithm, the results can be output in the form of a document. N

八皇后问题，可以推广到N皇后，在学校的实验课上做的，用回溯法-The eight queens problem can be generalized to the N-Queens in the experimental class of the school, with backtracking