分治算法是基于多分枝递归的一种算法设计模式。分治算法递归地把一个大问题分解为多个类型相同的子问题，直到这些子问题足够的简单能被直接解决。最后把这些子问题的解结合起来就能得到原始问题的解。-Divide and conquer algorithm is based on a multi-branch recursive algorithm design pattern. Divide and conquer algorithm recursively to a large problem into several sub-types of the same problem, until these sub-problems can be simple enough to directly address. Finally, the solution of these sub-problems together can get the original problem is solved.