Software Engineer Intern

You are given an array/list 'prices' where the elements of the array represent the prices of the stock as they were yesterday and indices of the array represent minutes. Your task is to find and return the maximum profit you can make by buying and selling the stock. You can buy and sell the stock only once.

Note:

You can’t sell without buying first.

For Example:

For the given array [ 2, 100, 150, 120],
The maximum profit can be achieved by buying the stock at minute 0 when its price is Rs. 2 and selling it at minute 2 when its price is Rs. 150.
So, the output will be 148.

You are given a 2D array arr representing a collection of N intervals, where each interval is of the form [start, end].

Your task is to identify and return all the "isolated" intervals. An interval is considered isolated if it does not overlap with any other interval in the given set.

You are given an array “arr'' of integers. Your task is to find the contiguous subarray within the array which has the largest product of its elements. You have to report this maximum product.

An array c is a subarray of array d if c can be obtained from d by deletion of several elements from the beginning and several elements from the end.

For e.g.- The non-empty subarrays of an array [1,2,3] will be- [1],[2],[3],[1,2],[2,3],[1,2,3]. 

For Example:

If arr = {-3,4,5}.
All the possible non-empty contiguous subarrays of “arr” are {-3}, {4}, {5}, {-3,4}, {4,5} and {-3,4,5}.
The product of these subarrays are -3, 4, 5, -12, 20 and -60 respectively.
The maximum product is 20. Hence, the answer is 20.

Follow Up:

Can you solve this in linear time and constant space complexity?

My hackathon use case was that we were given datasets for three countries in their regional languages. The data consisted of client addresses in an unstructured format, and the task was to convert this data into a structured format and then create a website for it, including the CRUD API.

We had to present the solution we created in 24 hours to the jury, and they evaluated it on an individual basis. The topic of the presentation was the solution we devised for the problem of unstructured address data.