Posted on Fri 21 February 2025 in Leetcode • Tagged with bst, iterator
Question Link : https://leetcode.com/problems/binary-search-tree-iterator/
Difficulty: Medium
Premium: False
Implement the BSTIterator class that represents an iterator over the in-order traversal of a binary search tree (BST):
BSTIterator(TreeNode root) Initializes an object of the BSTIterator class. The root of the BST is given as part of …
Posted on Fri 21 February 2025 in Leetcode • Tagged with iterator
Question Link : https://leetcode.com/problems/flatten-nested-list-iterator/
Difficulty: Medium
Premium: False
You are given a nested list of integers nestedList. Each element is either an integer or a list whose elements may also be integers or other lists. Implement an iterator to flatten it. Implement the NestedIterator class:
NestedIterator …
Posted on Fri 22 November 2024 in Leetcode Premium • Tagged with iterator
Question Link : https://leetcode.com/problems/flatten-2d-vector/
Difficulty: Medium
Premium: True
Design an iterator to flatten a 2D vector. It should support the next and hasNext operations. Implement the Vector2D class:
Vector2D(int[][] vec) initializes the object with the 2D vector vec. next() returns the next element from the …