分而治之是一种使用递归解决问题的算法，主要的技巧是将一个大的复杂的问题划分为多个子问题，而这些子问题可以作为终止条件，或者在一个递归步骤中得到解决，所有子问题的解决结合起来就构成了对原问题的解决 -Divide and rule is a solution to the problem using the recursive algorithm, the main technique is to a large complex problem is divided into multiple sub-issues, which are sub-problems can be used as the termination of the conditions, or in a recursive step is resolved, all sub- problems combine to constitute the original problem