题目地址:2005.Lovely Number 思路: 若测试数据出现的次数为奇数,则输出它. 所以,可以先排序,若前后相等,前后都设为0,最后不为0的则可以输出. 具体代码如下: #include <iostream> #include <algorithm> using namespace std; int main() { int t; while (cin >> t) { int *array = new int[t]; ; i < t; i++) { c…

//   B. Duff in Love time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Duff is in love with lovely numbers! A positive integer x is called lovely if and only if there is no such positive int…

题意: 一个数x被定义为lovely number需要满足这样的条件:不存在一个数a(a>1),使得a的完全平方是x的因子(即x % a2  != 0). 给你一个数n,求出n的因子中为lovely number的最大因子. 思路: 由于1<=n<=0=109,所以我们只要从1到找sqrt(n)就好,然后先从最大因子开始判断是否满足lovely number的条件,当满足时直接出输出即可. 代码如下: #include <iostream> #include <cstd…

B. Duff in Love Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/588/problem/B Description Duff is in love with lovely numbers! A positive integer x is called lovely if and only if there is no such positive integer a > 1 such…

1.每一个合数都可以由若干个素数相乘而得到 2.质因数知识 :求一个数因数的个数等于它的每个质因数的次数加一的和相乘的积因为质因数可以不用,所以要加一.例如6=2x3,两个质因数都是一次,如果两个质因数都不用,它的一个因数是1:只用因数2,它的第二个因数就是2:只用因数3,它的第三个因数就是3:两个质因数都用,它的第四个因数就是6. 所以6的因数的个数就是(1+1)(1+1)=4.再如12=2²x3,两个质因数,2是2次,3是一次,如果两个质因数都不用,它的一个因数是1:只用一个因数2,它的第二…

B. Duff in Love time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Duff is in love with lovely numbers! A positive integer x is called lovely if and only if there is no such positive integer…

B. Duff in Love time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Duff is in love with lovely numbers! A positive integer x is called lovely if and only if there is no such positive integer…

Unit 8 Environment I. 不定式(to do)在雅思写作中的运用 1)名词 • 主语(句首) To protect the environment is everyone's duty. =It is everyone's duty to protect the environment. For middle-aged men to change their jobs is difficult =It is difficult for middle-aged men to ch…

B. Duff in Love time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Duff is in love with lovely numbers! A positive integer x is called lovely if and only if there is no such positive integer …

快速竞技#4 A–Duff and Meat588A = =这题不知道怎么写题解了.. 直接上code---. #include<bits/stdc++.h> #include<string.h> using namespace std; typedef long long LL; typedef unsigned long long ULL; const double eps=1e-5; const double pi=acos(-1.0); const int mod=1e8+…