Flatten

LeetCode 251. Flatten 2D Vector

原题链接在这里：https://leetcode.com/problems/flatten-2d-vector […]

251. Flatten 2D Vector

提示一大堆，也没看懂。只要2个Iter就行了，iter1是大LIST的iterator,iter2只能是小s […]

251. Flatten 2D Vector 平铺二维矩阵

Implement an iterator to flatten a 2d vector. Example: […]