摘要：
The set[1,2,3,…,n]contains a total ofn! unique permutations.By listing and labeling all of the permutations in order,We get the following sequence (ie... 阅读全文
摘要：
Given amxnmatrix, if an element is 0, set its entire row and column to 0. Do it in place.二维数组中为0的元素，就把该元素所在的行和列都置为0思路：开个结构数组p，用p记录该二维数组中为0的点的i，j脚标。然后分... 阅读全文