Processing an element entails computing a difference, performing a compare, and Outer loop is invoked n- 1 times, and the ith iteration processes n 1 i elements. You shouldĪlso derive its time complexity as a function of the length n of the input array. Using a pair of nested for-loops and test it in a matter of a few minutes. ELEMENTS OF PROGRAMMING INTERVIEWS IN JAVA UPDATEUpdate the largest difference to S - S, You should be able to code this algorithm Indices i and j > i, if S - S is greater than the largest difference seen so far, Problem statement you have to buy before you can sell.Īt this point, a brute-force algorithm would be appropriate. The minimum can occur after the maximum, which violates the requirement in the If you try a few test cases, you will see that You may be tempted to simply return the difference of theįigure 1: Share price as a function of time. That the purchase and sale have to take place at the start of the day means that it Numbers, representing the low, high, and starting prices for each day. Let's say the input consists of three arrays L, H, and S, of nonnegative floating point For example, you should ask for the input format. You may want to stop reading now, and attempt this problem on your own.įirst clarify the problem. (This algorithm may be needed to backtest a trading strategy.) Subject to the constraint that the buy and the sell have to take place at the start of theĭay. Have been made by buying and then selling a single share over a given day range, In an interview to design an algorithm that determines the maximum profit that could The price at the opening bell (denoted by the white square). Specifically, for each day, the chart shows the daily high and low, and It depicts movements in the share price of a company Gorithms, system design, and problem solving. The primary focus of EPI is data structures, al¬ Ing, or otherwise, without the prior consent of the authors.Įlements of Programming Interviews (EPI) aims to help engineers interviewing for Mitted, in any form, or by any means, electronic, mechanical, photocopying, record¬ No part of this publication may be reproduced, stored in a retrieval system, or trans¬ Indulges in his passion for puzzles, movies, travel, and adventures with Nidhi andĮlements of Programming Interviews: The Insiders' Guideīy Adnan Aziz, Tsung-Hsien Lee, and Amit PrakashĬopyright © 2015 Adnan Aziz, Tsung-Hsien Lee, and Amit Prakash. When he is not improving business intelligence, he He received his Ph.D.įrom The University of Texas at Austin his undergraduate degree is from Indian ![]() Primarily on machine learning problems that arise in the context of online advertising.īefore that he worked at Microsoft in the web search team. Previously, he was a Member of the Technical Staff at Google, where he worked He takes special pride in helping toĪmit Prakash is a co-founder and CTO of ThoughtSpot, a Silicon Valley startup. To apply algorithms to every aspect of his life. He has a passion for designing and implementing algorithms. and undergraduate degrees from National Tsing Hua ELEMENTS OF PROGRAMMING INTERVIEWS IN JAVA SOFTWAREPreviously, he workedĪs a Software Engineer at Google and as Software Engineer Intern at Facebook. Tsung-Hsien Lee is a Senior Software Engineer at Uber. Plays with his children, Laila, Imran, and Omar. Qualcomm, IBM, and several software startups. from The University of California at Berkeley his undergraduateĭegree is from Indian Institutes of Technology Kanpur. At Austin, where he conducted research and taught classes in applied algorithms.
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