Aladdin and the Return Journey Time Limit: 2000ms Memory Limit: 32768KB This problem will be judged on LightOJ. Original ID: 134864-bit integer IO format: %lld      Java class name: Main Finally the Great Magical Lamp was in Aladdin's hand. Now he wa…

Finally the Great Magical Lamp was in Aladdin's hand. Now he wanted to return home. But he didn't want to take any help from the Genie because he thought that it might be another adventure for him. All he remembered was the paths he had taken to reac…

题目链接:传送门 题目大意:一棵无根树,每个点上有权值,两种操作,0 x y询问x~y路径上权值和 1 x y将 节点 x 权值变为y.对于询问操作输出答案. 题目思路:树链剖分 #include <iostream> #include <cstdio> #include <cstdlib> #include <cmath> #include <algorithm> #include <cstring> #include <st…

http://lightoj.com/volume_showproblem.php?problem=1341 Aladdin and the Flying Carpet Time Limit:3000MS     Memory Limit:32768KB     64bit IO Format:%lld & %llu Submit Status Practice LightOJ 1341 Description It's said that Aladdin had to solve seven…

It's said that Aladdin had to solve seven mysteries before getting the Magical Lamp which summons a powerful Genie. Here we are concerned about the fourth mystery. In the cave, Aladdin was moving forward after passing the pathway of magical stones. H…

题目链接: https://vjudge.net/problem/LightOJ-1341 题目描述: 问有几种边长为整数的矩形面积等于a,且矩形的短边不小于b 算数基本定理的知识点:https://baike.baidu.com/item/%E7%AE%97%E6%9C%AF%E5%9F%BA%E6%9C%AC%E5%AE%9A%E7%90%86/10920095?fr=aladdin #include<cstdio> #include<vector> #include<c…

http://lightoj.com/volume_showproblem.php?problem=1341 题意:给你矩形的面积(矩形的边长都是正整数),让你求最小的边大于等于b的矩形的个数. 思路:根据唯一分解定理,把X写成若干素数相乘的形式,则X的正因数的个数为:(1+a1)(1+a2)(1+a3)...(1+an).(ai为指数) 因为这道题目是求矩形,所以知道一个正因数后,另一个正因数也就确定了,所以每组正因数重复计算了两遍,需要除以2. 最后减去小于b的因数. #include<io…

http://www.lightoj.com/volume_showproblem.php?problem=1341 题意:给你长方形的面积a,边最小为b,问有几种情况. 思路:对a进行素因子分解,再乘法原理算一下,最后减去小于b的因子的情况即可. /** @Date : 2016-12-01-19.04 * @Author : Lweleth (SoungEarlf@gmail.com) * @Link : https://github.com/ * @Version : */ #includ…

链接: https://vjudge.net/problem/LightOJ-1349 题意: Finally Aladdin reached home, with the great magical lamp. He was happier than ever. As he was a nice boy, he wanted to share the happiness with all people in the town. So, he wanted to invite all peopl…

题目链接:http://lightoj.com/volume_showproblem.php?problem=1341 题意:给你地毯面积和最小可能边的长度,让你求有几种组合的可能. 题解:这题就厉害了.第一次了解了算术基本定理. 这里运用的是应用1.你想,你把所有的正因数个数找到了,减半,不就是组合对数了么QWQ.最后再减去小于最小的边的可能性.Perfect.数学真奇妙. 素数的板子是最开始贴的自己的那个.QWQ #include<iostream> #include<cmath&g…