Grab Interview Guide

Imagine hamsters lined up in a row! You need to place food buckets so every hamster gets fed, but buckets can't be next to each other or next to houses. Find the fewest buckets you need.

You're planning a trip and need to buy tickets for specific travel days. Given the costs for 1-day, 7-day, and 30-day passes, determine the minimum total cost to cover all your travel days.

Simulate addition with base -2 using the given arrays representing two negabinary numbers. Return the result as a negabinary array, ensuring no leading zeros.

You're given the sums of columns in a 2-row binary matrix and the row sums. Your task is to reconstruct a possible binary matrix that satisfies these constraints.

Find two numbers in a given array that add up to a specific target value, and return their indices. Essentially, you need to efficiently locate the pair that satisfies the sum requirement.

Design a data structure that acts as a Least Recently Used (LRU) cache. Implement methods to get and put key-value pairs, evicting the least recently used entry when the cache is full.

Given a list of daily temperatures, find how many days you have to wait until a warmer temperature. Return a list where each element represents the waiting days for each day's temperature.

Given an absolute file path (Unix style), simplify it by resolving redundant separators, directory names, and navigating back up the directory structure. Return the simplified canonical path.

Find the length of the longest substring within a given string that contains no repeating characters. The substring must be contiguous.

You are given a list of accounts where each account has a name and a list of email addresses. Your task is to merge accounts belonging to the same person based on shared email addresses.

You're given a number in its binary form. Determine the number of steps to reduce it to one by repeatedly dividing by two (if even) or adding one (if odd).

Determine if a string containing parentheses is valid. A valid string has matching and properly nested opening and closing parentheses.

Find the longest palindromic substring within a given string. A palindromic substring reads the same forwards and backward.

Determine the total number of continuous subarrays within a given array that sum up to a specific target value, k.

You are a robber planning to rob houses along a street. Maximize your loot, but be careful - adjacent houses have connected security systems that will trigger an alarm if you rob them both.