10 solar panel activated 11 low battery warning 12 tire one: low air pressure 13 solar panel activated 14 low battery warning 21 solar panel activated 3…

Implement a mock client for testing. Do not rely on its behavior in your implementation. class MockClient implements Client { // These numbers are for t…

You are given an array of integers. Implement a class that can support the following operations: Get the sum of elements in a specific index range Updat…

Design a Donations Website Donations Website Features: Users donate to charity Donation confirmations Donations paid to charity Design a website to coll…

Given a dictionary of words and a pair of words. For the pair, display the possible word chain using the input as the starting and ending words. Print a…

Problem 1: Given a budget of $3000 dollars to buy Apple products, create an algorithm to print all possible combinations of products you can buy. Given…

Given a list of strings, find the groups of strings that can be rotated to each other (so each character is changed by the same distance). Input: [‘abc’…

Design a system that allows DoorDash’s consumers to add reviews on ordered food items. Consumers will earn rewards ($) based on the quality of the revie…

Given an array of integers that is an arithmetic progression missing one integer, return the missing integer. Example: [1, 2, 4, 5] -> 3 这道题的核心是等差数列缺项定位…

Implement a program that finds the shortest path of links between one Wikipedia URL and another. You can imagine the final result is something similar t…

Count elements in a chemical molecular formula. Examples: H2O {“H”: 2, “O”: 1} H2(CO2)2 {“H”: 2, “C”: 2, “O”: 4} K4(ON(SO3)2)2C5 {“K”: 4, “O”: 14, “N”:…

You are given an array of events where events[i] = [startDayi, endDayi] . Every event i starts at startDayi and ends at endDayi . You can attend an even…

Given a collection of strings, write a function that can group the anagrams together. You can return the answer in any order. Test collection: [“able”,…

Merge Intervals Given an array intervals representing a collection of intervals, where each interval is intervals[i] = [start, end] , write a function t…

You are given an array prices where prices[i] is the price of a given stock on the i -th day, and an integer fee representing a transaction fee. Find th…

Question: You are walking on a 2D map contoured with various heights of land that accumulates water when it rains. Specifically, when the rainwater heig…

Write a function that decompresses a string: “a(bcd){3}e” -> “abcdbcdbcde” “a(bc(d){4}e){3}f” -> “abcddddebcddddebcddddef” 这道题要求实现一个字符串解压函数，核心是把形如…

CoderPad provides a basic SQL sandbox with the following schema. You can also use commands like show tables and desc <table_name> . employees id (…

Given an array of integers nums and an integer target , return indices of the two numbers such that they add up to target . You may assume that each inp…

Query: use the query to match the key. Key: label of each data slice. Value: the data itself. 1. Compute the similarity between query and key. query [1…