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Problem Statement (Asked By Jane Street) The function cons(a, b) creates a pair of two elements. Implement two functions: For instance: Below is the implementation of cons: Your task is to define the car and cdr functions. Disclaimer: Try solving the problem on your own first! Use this solution only as a reference to learn and […]
January 3, 2025 | dsa, DSA Sheet, Jane Street | No comments
Problem Statement (Asked By Stripe) You are given an array of integers. Your task is to find the smallest missing positive integer in O(N) time using O(1) additional space. In other words, identify the smallest positive number that is not present in the array. The array may include: You are allowed to modify the input […]
Given the root of a binary tree, create two functions:
serialize(root) – Converts the binary tree into a string representation.
deserialize(s) – Reconstructs the binary tree from its string representation.
January 1, 2025 | array, dsa, DSA Sheet, Google | 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
Problem Statement (Asked By Google) Given a list of integers and a target number k, determine if there exist two numbers in the list whose sum equals k. For example, given [10, 15, 3, 7] and k = 17, return True because 10 + 7 = 17. Bonus: Can you solve this in a single […]