A prime number (or a prime) is a natural number greater than 11 that cannot be formed by multiplying two smaller natural numbers. Now lets define a number NN as the supreme number if and only if each number made up of an non-empty subsequence of all…

题目链接:https://nanti.jisuanke.com/t/31452 A prime number (or a prime) is a natural number greater than $1$ that cannot be formed by multiplying two smaller natural numbers. Now lets define a number $N$ as the supreme number if and only if each number m…

Swap There is a sequence of numbers of length nn, and each number in the sequence is different. There are two operations: Swap the first half and the last half of the sequence (if nn is odd, the middle number does not change) Swap all the numbers in…

interlinkage: https://nanti.jisuanke.com/t/38226 description: solution: 显然$\frac{\phi(j^2)}{\phi(j)}=j,\frac{\phi(k^3)}{\phi(k)}=k^2$ 原式可以化简为 $\sum_{i=1}^{n}\sum_{j=1}^n\sum_{k=1}^{n}jk^2\phi(gcd(i,j,k))$ 我们枚举$gcd(i,j,k)$,得 $\sum_{d=1}^{n}\phi(d)\sum…

ICPC官网题面假的,要下载PDF,点了提交还找不到结果在哪看(我没找到),用VJ交还直接return 0;也能AC 计蒜客题面 这个好 Time limit 3000 ms OS Linux 题目来源 ACM-ICPC 2017 Asia Xi'an VJ爬到的英文题面什么鬼啊,除了标题,哪里有xor字样啊?\((A[i_1], A[i_2], . . . , A[i_t])\)意思是gcd啊?简直了. 计蒜客的题面 2000ms 是不是计蒜客评测姬快一点,时限少了1s 262144K Con…

Ada, Bertrand and Charles often argue over which TV shows to watch, and to avoid some of their fights they have finally decided to buy a video tape recorder. This fabulous, new device can record kk different TV shows simultaneously, and whenever a sh…

计蒜客\(2019CSP\)比赛第二场 巧妙爆零这场比赛(我连背包都不会了\(QWQ\) \(T1\) \(Too\) \(Young\) 大学选课真的是一件很苦恼的事呢! \(Marco\):"我要两年毕业!我要选尽量多的学分!这些课统统选上!" 长者:"你啊,\(Too Young\)!你看看作业量,你做的完吗?" \(Marco\)(笑容逐渐消失\(.gif\)):"那可咋整啊?" 长者:"还能咋整?退课呗!" 已知 \…

POJ 2749 分解因数(计蒜客) Description 给出一个正整数a,要求分解成若干个正整数的乘积,即a = a1 * a2 * a3 * - * an,并且1 < a1 <= a2 <= a3 <= - <= an,问这样的分解的种数有多少.注意到a = a也是一种分解. Input 第1行是测试数据的组数n,后面跟着n行输入.每组测试数据占1行,包括一个正整数a (1 < a < 32768) Output n行,每行输出对应一个输入.输出应是一个正…

VJ链接:https://vjudge.net/contest/412095#problem/A Cat 计蒜客 - 42540 题意: 给你一个区间[L,R],给你现在拥有的钱S.你需要从[L,R]区间中选取一些连续的数,如果i^(i+1)^(i+2)^...^(j-1)^j<=s(L<=i<=j<=R),那么你就可以拥有[i,j]这一个子区间.问你你拥有的子区间长度最长是多少 1<=L,R<=1e18 1<=S<=2e18 题解: 你会发现4k^(4k+…

鉴于我市拥堵的交通状况,市政交管部门经过听证决定在道路两侧安置自动停车收费系统.当车辆驶入车位,系统会通过配有的摄像头拍摄车辆画面,通过识别车牌上的数字.字母序列识别车牌,通过连接车管所车辆信息数据库确认车辆,进行扣费. 斗智斗勇的好戏一般从此处展开… 一些车主通过在停车时遮挡车牌上的一个或多个数字.字母序列,来阻碍识别系统的识别工作,以此逃避停车费用的缴纳. 车主这简直是用轻轻的一挡搞出来一个世界难题有木有?!管理是一方面,技术解决才是王道啊. 这么难的项目不得不交给计蒜客实验室了.D 神负责…