:type row: 当前放置皇后的行号 :type hills: 主对角线占据情况 [1 = 被占据，0 = 未被占据] :type next_row: 下一行被占据的情况 [1 = 被占据，0 = 未被占据] :type dales: 次对角线占据情况 [1 = 被占据，0 = 未被占据] :rtype: 所有可行解的个数
(row = 0, hills = 0, next_row = 0, dales = 0, count = 0)
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