Robina Li

Given an array of integers nums and an integer k, return the total number of subarrays whose sum equals to k.

Given an integer array nums and an integer k, return the maximum length of a subarray that sums to k. If there is no such subarray, return 0.

Given an input string (s) and a pattern (p), implement wildcard pattern matching with support for '?' and '*' where:

Design a time-based key-value data structure that can store multiple values for the same key at different timestamps and retrieve the key’s value at a certain timestamp.

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].