Robina Li

You are implementing a program to use as your calendar. We can add a new event if adding the event will not cause a double booking.

You are given an integer array nums and you have to return a new array counts. The array counts has the property where counts[i] is the number of smaller elements...

You are given two integer arrays fruits and baskets.

Given an integer array nums, handle multiple queries of the following types:

You are given an empty 2D binary grid grid of size m x n. The grid represents a map where 0’s represent water and 1’s represent land. Initially, all the...

There is a directed graph of n nodes with each node labeled from 0 to n - 1. The graph is represented by a 0-indexed 2D integer array graph where...

You are given an integer array nums and you have to return a new array counts. The array counts has the property where counts[i] is the number of smaller elements...

LCR 113. Course Schedule II

A tree is an undirected graph in which any two vertices are connected by exactly one path. In other words, any connected graph without simple cycles is a tree.

There is a new alien language that uses the English alphabet. However, the order among the letters is unknown to you.