Robina Li

Given an array of integers nums sorted in non-decreasing order, find the starting and ending position of a given target value.

A peak element is an element that is strictly greater than its neighbors.

Given a sorted array of distinct integers and a target value, return the index if the target is found. If not, return the index where it would be if it...

Given an array of integers temperatures representing the daily temperatures, return an array answer such that answer[i] is the number of days you have to wait after the i-th day...

Design a data structure that can query the frequency of a given value in a given subarray.

Given an integer array nums, return an array answer such that answer[i] is equal to the product of all the elements of nums except nums[i].

You are given an integer n, which indicates that there are n courses labeled from 1 to n. You are also given an array relations where relations[i] = [prevCoursei, nextCoursei],...

Given an array of positive integers nums and a positive integer target, return the minimal length of a subarray whose sum is greater than or equal to target. If there...

Given an integer array nums and an integer k, return the length of the shortest non-empty subarray of nums with a sum of at least k. If there is no...

Given an integer array nums and an integer val, remove all occurrences of val in nums in-place. The order of the elements may be changed. Then return the number of...