James Pan

原题网址：https://leetcode.com/problems/zigzag-iterator/Given two 1d vectors, implement an iterator to return their elements alternately.For example, given two 1d vectors:v1 = [1, 2]v2 = [3, 4

原题网址：https://leetcode.com/problems/peeking-iterator/Given an Iterator class interface with methods: next() and hasNext(), design and implement a PeekingIterator that support the peek() operati

原题网址：https://leetcode.com/problems/binary-search-tree-iterator/Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST.Calling ne

原题网址：https://leetcode.com/problems/flatten-nested-list-iterator/Given a nested list of integers, implement an iterator to flatten it.Each element is either an integer, or a list -- whose ele

原题网址：https://leetcode.com/problems/flatten-2d-vector/Implement an iterator to flatten a 2d vector.For example,Given 2d vector =[ [1,2], [3], [4,5,6]]By calling next repea

原题网址：https://leetcode.com/problems/next-permutation/Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangement is

原题网址：https://leetcode.com/problems/set-matrix-zeroes/Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place.click to show follow up.Follow up:Did