Description: The idea is to divide and conquer difficult to directly solve a big problem is divided into some smaller number of similar problems to solve, divide and conquer the whole problem solving process is divided into several small problems of divide and rule, if the decomposition sub-problems are too big, relatively speaking, you can divide and conquer strategy of repeated use of these sub-problems into smaller sub-problems of the same type, until the child produces easy to solve the problem, if necessary, to gradually merge the sub-solution of the problem, to be the solution. Divide and conquer method is usually used for solving recursive, divide and conquer is usually said to find large-scale problems is a problem with the relationship between small-scale method is a recursive design specific strategies. The basic steps to divide and conquer recursion on each floor has three steps:
① decomposition: the relative size of the original large problem into smaller, independent, original proble
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