You are given a 0-indexed array nums consisting of positive integers.
There are two types of operations that you can apply on the array any number of times:
Read More »LeetCode: 2870-Minimum Number of Operations to Make Array Empty 解題紀錄 Given n points on a 2D plane where points[i] = [xi, yi], Return the widest vertical area between two points such that no points are inside the area.
You are given an integer array prices representing the prices of various chocolates in a store. You are also given a single integer money, which represents your initial amount of money.
An image smoother is a filter of the size 3 x 3 that can be applied to each cell of an image by rounding down the average of the cell and the eight surrounding cells (i.e., the average of the nine cells in the blue smoother). If one or more of the surrounding cells of a cell is not present, we do not consider it in the average (i.e., the average of the four cells in the red smoother).
Design a food rating system that can do the following:
Given two strings s and t, return true if t is an anagram of s, and false otherwise.
You are given the array paths, where paths[i] = [cityAi, cityBi] means there exists a direct path going from cityAi to cityBi. Return the destination city, that is, the city without any path outgoing to another city.
You are given a 0-indexed m x n binary matrix grid.
A 0-indexed m x n difference matrix diff is created with the following procedure:
Given the root of a binary tree, construct a string consisting of parenthesis and integers from a binary tree with the preorder traversal way, and return it.
