摘要：
Follow up for N-Queens problem.Now, instead outputting board configurations, return the total number of distinct solutions.计算N皇后的合法解的数量。解题思路：这次使用了更优化的... 阅读全文
摘要：
Find thekth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element.For exampl... 阅读全文