import java.io.*;import java.util.*;import java.math.*;public class Main { public static void main(String[] args) { Scanner sc = new Scanner(Syst...

Suppose you have a long flowerbed in which some of the plots are planted and some are not. However, flowers cannot be planted in adjacent plots - they would com...

Given an array of integers and an integer k, find out whether there are two distinct indices i and j in the array such that nums[i] = nums[j] and the absolute d...

关于时间的计算，会体现在我们程序的方方面面。然后我最近在写一个需求的时候，躺了一个大坑

Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M.

简单工厂模式 Simple Factory Pattern 也叫静态工厂方法模式 Static Factory Method Pattern，隶属于设计模式中的创建型模式。简单工厂通过一个静态方法来给使用方提供类创建的方式，将对象创建的控制权由使用方转换到提...

Hello小伙伴们，好多天不见，我兔妞又杀回来了！今天继续我们的Flex吧~之前讲的是不是都忘了

Write a program to find the nth super ugly number.

Write a program to check whether a given number is an ugly number.

Write an algorithm to determine if a number is "happy".