来研究一下opencv中的Ptr类，所谓的智能指针...
//////////////////// generic_type ref-counting pointer class for C/C++ objects ////////////////////////
/*!
Smart pointer to dynami
https://leetcode.com/problems/intersection-of-two-arrays-ii/
Given two arrays, write a function to compute their intersection.
Example:
Given nums1 = [1, 2, 2, 1], nums2 = [2,
2], retu
