Daily Coding Problem: Problem #915 [Hard]

Good morning! Here's your coding interview problem for today.

This problem was asked by Airbnb.

You are given an array X of floating-point numbers x1, x2, ... xn. These can be rounded up or down to create a corresponding array Y of integers y1, y2, ... yn.

Write an algorithm that finds an appropriate Y array with the following properties:

• The rounded sums of both arrays should be equal.
• The absolute pairwise difference between elements is minimized. In other words, |x1- y1| + |x2- y2| + ... + |xn- yn| should be as small as possible.

For example, suppose your input is [1.3, 2.3, 4.4]. In this case you cannot do better than [1, 2, 5], which has an absolute difference of |1.3 - 1| + |2.3 - 2| + |4.4 - 5| = 1.

Upgrade to premium and get in-depth solutions to every problem, including this one. Since you were referred by one of our affiliates, you'll get a 10% discount on checkout!

If you liked this problem, feel free to forward it along so they can subscribe here! As always, shoot us an email if there's anything we can help with!

Practice makes perfect. Book a mock interview with a FAANG-level interviewer today from our friends at Exponent (10% off!).

System design interviews are becoming more popular in SWE interviews. Here's how to prepare.

No more? Snooze or unsubscribe.