CA Loves GCD 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5656 Description CA is a fine comrade who loves the party and people; inevitably she loves GCD (greatest common divisor) too. Now, there are N different numbers. Each time, CA will select s…
CA Loves GCD 题目链接: http://acm.hust.edu.cn/vjudge/contest/123316#problem/B Description CA is a fine comrade who loves the party and people; inevitably she loves GCD (greatest common divisor) too. Now, there are different numbers. Each time, CA will se…
题目的意思就是: n个数,求n个数所有子集的最大公约数之和. 第一种方法: 枚举子集,求每一种子集的gcd之和,n=1000,复杂度O(2^n). 谁去用? 所以只能优化! 题目中有很重要的一句话! We guarantee that all numbers in the test are in the range [1,1000]. 1 1 这句话对解题有什么帮助? 子集的种数有2^n种,但是,无论有多少种子集,它们的最大公约数一定在1-1000之间. 所以,我们只需要统计1-1000的最大公…
CA Loves GCD Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 1707 Accepted Submission(s): 543 Problem Description CA is a fine comrade who loves the party and people; inevitably she loves G…
CA Loves GCD Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 809 Accepted Submission(s): 283 Problem Description CA is a fine comrade who loves the party and people; inevitably she loves GC…
CA Loves GCD Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 882 Accepted Submission(s): 305 Problem Description CA is a fine comrade who loves the party and people; inevitably she loves GC…
题目:http://acm.hdu.edu.cn/showproblem.php?pid=5213 Lucky Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 763 Accepted Submission(s): 249 Problem Description WLD is always very lucky.His secret…
题目链接: acm.hdu.edu.cn/showproblem.php?pid=1165 Eddy's research II Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 5656 Accepted Submission(s): 2045 Problem Description As is known, Ackermann f…
Saving HDU Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 7194 Accepted Submission(s): 3345 Problem Description 话说上回讲到海东集团面临内外交困,公司的元老也只剩下XHD夫妇二人了.显然,作为多年拼搏的商人,XHD不会坐以待毙的. 一天,当他正在苦思冥想解困良策的…
http://acm.hdu.edu.cn/showproblem.php?pid=3037 Lucas定理模板. 现在才写,noip滚粗前兆QAQ #include<cstdio> #include<cstring> #include<algorithm> using namespace std; typedef long long ll; int jc[100003]; int p; int ipow(int x, int b) { ll t = 1, w = x;…
Special equations Time Limit:1000MS Memory Limit:32768KB 64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4569 Description Let f(x) = a nx n +...+ a 1x +a 0, in which a i (0 <= i <= n) are all known integers. We call f(x) 0 (mod…
The kth great number Time Limit:1000MS Memory Limit:65768KB 64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4006 Description Xiao Ming and Xiao Bao are playing a simple Numbers game. In a round Xiao Ming can choose to write down a nu…
How many integers can you find Time Limit:5000MS Memory Limit:32768KB 64bit IO Format:%I64d & %I64u Submit Status Practice HDU 1796 Description Now you get a number N, and a M-integers set, you should find out how many integers which are sm…
hdu5901题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5901 code vs 3223题目链接:http://codevs.cn/problem/3223/ 思路:主要是用了一个Meisell-Lehmer算法模板,复杂度O(n^(2/3)).讲道理,我不是很懂(瞎说什么大实话....),下面输出请自己改 #include<bits/stdc++.h> using namespace std; typedef long long LL;…