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There is a staircase with N steps, and you can ascend either 1 step or 2 steps at a time. Write a function to calculate the number of unique ways to climb the staircase. The sequence of steps matters.
January 11, 2025 | Amazon, Data Structure, dsa | No comments
Problem Statement (Asked By Uber) Given a list of integers, return a new list such that each element at index i of the new list is the product of all the elements in the original list except the one at i. For instance, if the input is [1, 2, 3, 4, 5], the expected output […]
December 30, 2024 | Algorithm, array, Data Structure, dsa, Uber | No comments
A heap is a specialized tree-based data structure that satisfies the heap property. It is commonly used to implement priority queues and efficient sorting algorithms like heap sort.
June 10, 2023 | Algorithm, Data Structure | No comments
What is a Trie in DSA? A trie, often known as a prefix tree, is a tree-like data structure used for fast string searching and prefix matching. It allows for the quick retrieval of words or keys connected with each node. The word Trie is derived from reTRIEval, which means finding something or obtaining it. […]
May 31, 2023 | Data Structure | No comments
What is the Lowest Common Ancestor? In a tree, the lowest common ancestor (LCA) of two nodes, n1 and n2, is the shared ancestor located farthest from the root and has both n1 and n2 as descendants. Properties of the Lowest Common Ancestor: An LCA can be one of the input nodes themselves if one […]
May 30, 2023 | Data Structure | No comments
A Binary Search Tree (BST) is a type of binary tree that satisfies the following properties: For any node in the tree, all values in its left subtree are less than its value. For any node in the tree, all values in its right subtree are greater than its value. The left and right subtrees […]
May 29, 2023 | Data Structure | No comments
In binary trees, the views and types refer to different perspectives and classifications of the tree structure. Types of Views in Binary Tree are : Horizontal View: The horizontal view of a binary tree shows the nodes from left to right at each level. Nodes at the same level are listed in the order of their […]
May 29, 2023 | Data Structure | No comments
Binary Tree Structure: A binary tree is a tree data structure where each node has at most two children: a left child and a right child. The topmost node of a binary tree is called the root node. Each node in a binary tree can have either zero, one, or two child nodes. The child […]
May 28, 2023 | Data Structure | No comments
What is a Queue in DSA? A queue is a linear data structure that holds elements in a certain order. It accesses items using the FIFO (First In First Out) method. It can only be changed by adding data entities at one end or removing data entities at the other. The end where insertion occurs is known as the Rear, while the end where deletion occurs is known as the Front. This ordering guarantees that components are processed […]
May 26, 2023 | Data Structure | No comments
What is a Stack? A stack is an abstract data type that adheres to the Last-In-First-Out (LIFO) principle in the context of data structures and algorithms (DSA). It’s a linear data structure with operations like push (adding an element to the top) and pop (removing the topmost element). Note: A stack can be visualized as […]
May 23, 2023 | Data Structure | No comments