Robina Li

Given a circular integer array nums (i.e., the next element of nums[nums.length - 1] is nums[0]), return the next greater number for every element in nums.

You are given an integer array nums.

Given the integers zero, one, low, and high, we can construct a string by starting with an empty string, and then at each step perform either of the following:

We are given hours, a list of the number of hours worked per day for a given employee.

You are given an integer array nums and an integer target.

Given a string s, find the length of the longest substring without repeating characters.

Write an efficient algorithm that searches for a value target in an m x n integer matrix. This matrix has the following properties:

Given an array of integers nums, sort the array in ascending order and return it.

A city’s skyline is the outer contour of the silhouette formed by all the buildings in that city when viewed from a distance. Given the locations and heights of all...

You are given an array of strings equations that represent relationships between variables. Each string equations[i] is of length 4 and takes one of two different forms: "xi==yi" or "xi!=yi"....