E. Number With The Given Amount Of Divisors time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Given the number n, find the smallest positive integer which has exactly n divisors. It is guara…

题意:给定一个数N,求小于等于N的所有数当中,约数最多的一个数,如果存在多个这样的数,输出其中最大的一个. 分析:反素数定义:对于任何正整数x,其约数的个数记做g(x).例如g(1)=1,g(6)=4.如果某个正整数x满足:对于任意i(0<i<x),都有g(i)<g(x),则称x为反素数. 性质一:一个反素数的质因子必然是从2开始连续的质数.性质二:p=2^t1*3^t2*5^t3*7^t4.....必然t1>=t2>=t3>=.... 那题题目相当于求解小于等于N中,…

More Divisors Time Limit: 2 Seconds      Memory Limit: 65536 KB Everybody knows that we use decimal notation, i.e. the base of our notation is 10. Historians say that it is so because men have ten fingers. Maybe they are right. However, this is often…

CodeForces - 27E Number With The Given Amount Of Divisors Submit Status Description Given the number n, find the smallest positive integer which has exactly n divisors. It is guaranteed that for the given n the answer will not exceed 1018. Input The…

Time Limit: 5000MS Memory Limit: 131072K Case Time Limit: 2000MS Description N children are sitting in a circle to play a game. The children are numbered from 1 to N in clockwise order. Each of them has a card with a non-zero integer on it in his/her…

题意: 求因数个数为n的最小正整数k. n<=10^9输出其唯一分解形式 SOL: 模拟题,一眼看过去有点惊讶...这不是我刚看过的反素数吗... 咦数据怎么这么大,恩搞个高精吧... 于是T了... 真是丝帛...因为这题不用输出答案而是输出质因子与指数,那么高精也没什么卵用... 想想我们在反素数的时候除了记录还要做一件什么事呢...比较答案与当前搜索的大小...但这里是在太大了,所以就要找一个更小的通用比较方法... 傻逼想到了高精,帅的人都用了log log由于其良好的性质log(a*b…

题意: 反素数,膜一篇GOD's Blog...http://blog.csdn.net/ACdreamers/article/details/25049767 此文一出,无与争锋... CODE: 没有啦啦啦...…

Who Gets the Most Candies? Time Limit:5000MS     Memory Limit:131072KB     64bit IO Format:%I64d & %I64u Submit Status Description N children are sitting in a circle to play a game. The children are numbered from 1 to N in clockwise order. Each of th…

题目链接:http://www.lydsy.com:808/JudgeOnline/problem.php?id=3085 题意:求n(<=10^100)之内最大的反素数. 思路: 优化2: int prime[]= { 1, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101,103,107,109, 113,127,131,137,139, 14…

[bzoj1053]反素数 题意 对于任何正整数x,其约数的个数记作g(x).例如g(1)=1.g(6)=4.如果某个正整数x满足:g(x)>g(i) 0<i<x,则称x为反质数.例如,整数1,2,4,6等都是反质数.现在给定一个数N,你能求出不超过N的最大的反质数么? \(1<=N<=2,000,000,000\) 分析 设\(N={a_1}^{p_1}{a_2}^{p_2}...{a_m}^{p_m}\) 所以\(g(N)=\prod_{i=1}^m(p_i+1)\) 现…