地址:http://acm.split.hdu.edu.cn/showproblem.php?pid=6060 题目: RXD and dividing Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 524288/524288 K (Java/Others)Total Submission(s): 522    Accepted Submission(s): 219 Problem Description RXD has a tr…
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=6063 题目意思:字面意思,给出n,k,算出这个式子的答案. 思路:比赛的时候是打表找规律过了,赛后仔细研究一下数学上的具体做法,首先莫比乌斯函数,就是他后面给的那个式子μ(n)=(−1)k(n=p1p2…pk)   p1,p2,p3…pk是互不相同的的素数.满足这个条件的n,μ^2(n)=1,否则μ^2(n)=0:从这个定义里面我们发现所有满足μ^2(n)=0的n值必定满足n=a^2*b,其中μ^2…
[Link]: [Description] [Solution] 发现1010mod(109+7)=999999937; 猜测答案是nk 写个快速幂; 注意对底数先取模; [NumberOf WA] 1 [Reviw] 看到过的人那么多就应该想到找规律的. 大胆猜测 [Code] #include <bits/stdc++.h> using namespace std; #define int long long const int MOD = 1e9+7; int n,k; int get_…
[Link]: [Description] [Solution] [NumberOf WA] 1 [Reviw] [Code] #include <bits/stdc++.h> using namespace std; int t; int main(){ cin >> t; int num = 0; for (int i = 1;i <= t;i++){ int x; cin >> x; if (x<=35) num++; } cout <<…
FFF at Valentine Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1060    Accepted Submission(s): 506 Problem Description At Valentine's eve, Shylock and Lucar were enjoying their time as any oth…
Dying Light Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 513    Accepted Submission(s): 122 Problem Description LsF is visiting a local amusement park with his friends, and a mirror room su…
CSGO Time Limit: 20000/10000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 127    Accepted Submission(s): 20 Problem Description Senior Pan is crazy about CSGO and she is so skilled. She can kill every enemy she sp…
Ch’s gift Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1354    Accepted Submission(s): 496 Problem Description Mr. Cui is working off-campus and he misses his girl friend very much. After a w…
Big binary tree Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 597    Accepted Submission(s): 207 Problem Description You are given a complete binary tree with n nodes. The root node is numbere…
Colorful Tree Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 1539    Accepted Submission(s): 616 Sample Input 3 1 2 1 1 2 2 3 6 1 2 1 3 2 1 1 2 1 3 2 4 2 5 3 6 Sample Output Case #1: 6 Case #…