Leetcode 315题的优化解法有哪些? 剑指Offer 面试题36:数组中的逆序对 题目:在数组中的两个数字,如果前面一个数字大于后面的数字,则这两个数字组成一个逆序对。输入一个数组,求出这个数组中的逆序对的总数。 例如, 在数组{7,5,6,4}中,一共存在5个逆序对,分别是(7,6),(7,5),(7,4),(6,4)和(5...
Problem Description Recall the problem of finding the number of inversions. As in the course, we are given a sequence of numbers and we define an inversion to be a pair such that We motivated the problem of counting inversions as a good measure of how different two orderings are. However,...