1.直接令x=0,为了判断这一信息,对于所有含有多个1的yi,必然是无用的,答案至少为n且不能含有多位1的y2.令yi=2^(i-1),由此发现一定可以得到x每一位的答案,即答案最多为n.因此,发现方案数即n!,当$n\ge p$时答案一定为0,时间复杂度为o(p) 1 #include<bits/stdc++.h> 2 using namespace std; 3 #define mod 1000003 4 int n,fac[mod]; 5 int main(){ 6 fac[0]=1;…
-----------------心怀虔诚,奋勇前进,fighting!!!!!! Problem Description: inclusively: 包括一切地;包含地 simultaneously: 同时 index number : 指数; 索引编号 if and only if: 当且仅当 -----Rough Translation: Input: Output: For each test case, output one line contai…
http://acm.hdu.edu.cn/showproblem.php?pid=6600 题意:给你一个数x,允许你多次询问yi,然后回答你x xor yi 是否等于yi,询问尽量少的次数以保证能求出xi是几,求出这样询问次数最少的询问方案数. 最优方案就是对每位进行询问,每次只让yi的一位是1,一共n个二进制位.方案数为n! #include<bits/stdc++.h> using namespace std; #define ll long long ; ; ll a[maxn];…
题意:询问n!模1e6+7的结果 n<=1e9 思路: #include<bits/stdc++.h> using namespace std; typedef long long ll; typedef unsigned int uint; typedef unsigned long long ull; typedef pair<int,int> PII; typedef pair<ll,ll> Pll; typedef vector<int> VI…
Polycarp is practicing his problem solving skill. He has a list of n problems with difficulties a1,a2,-,an, respectively. His plan is to practice for exactly k days. Each day he has to solve at least one problem from his list. Polycarp solves the pro…
2019 Multi-University Training Contest 2 A. Another Chess Problem B. Beauty Of Unimodal Sequence 题意 给一个序列,求下标字典序最小和字典序最大的,先增后减的序列. 解体过程 比赛时首先不知道字典序最小LIS怎么求. 试图枚举分界点.[解体的开始] 公无渡河,公竟渡河? 活鱼在摸鱼,rdc在划水,sdcgvhgj在水深火热. 做法 考虑字典序最小的LIS怎么求? 这是个经典问题,预处理前缀LIS后缀L…
B. Polycarp's Practice time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Polycarp is practicing his problem solving skill. He has a list of nn problems with difficulties a1,a2,-,ana1,a2,-,an…
2019 Multi-University Training Contest 2 http://acm.hdu.edu.cn/contests/contest_show.php?cid=849 1005. Everything Is Generated In Equal Probability 考虑一个随机的排列的逆序对个数,显然对于两个数\(a,b\),他们位置是均匀排布的,也就是说有\(\frac{1}{2}\)的概率成为逆序对,并且是独立的. 所以一个长度为\(n\)的随机排列期望逆序对个…
条件变量相当于订阅-发布机制: 或者相当于同步的通知机制: 订阅和发布具有先后顺序:所以需要互斥量来维护顺序. 顺序不对,存在信号丢失问题. Problem statement[edit] For many applications, mutual exclusion is not enough. Threads attempting an operation may need to wait until some condition P holds true. A busy waiting l…
BestCoder Round #92 Skip the Class Accepts: 678 Submissions: 1285 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Problem Description Finally term begins. luras loves school so much as she could skip the class hap…
Skip the Class Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 1028 Accepted Submission(s): 599 Problem Description Finally term begins. luras loves school so much as she could skip the class happ…
Question I use OData v3 and WCF in visual studio 2012. I want to return List<string> using the following query, but got error "Can only specify query options (orderby, where, take, skip) after last navigation" List<string> output = (…
Skip the Class Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 253 Accepted Submission(s): 146 Problem Description Finally term begins. luras loves school so much as she could skip the class…
Skip List | Set 1 (Introduction) Can we search in a sorted linked list in better than O(n) time?The worst case search time for a sorted linked list is O(n) as we can only linearly traverse the list and cannot skip nodes while searching. For a Balan…
1. 报错如下: [ERROR] Error executing Maven. [ERROR] 1 problem was encountered while building the effective settings [FATAL] Non-parseable settings D:\ChengXu\maven\apache-maven-3.5.2\conf\settings.xml: end tag name </settings> must match start tag name…
系统环境 # cat /etc/redhat-release Red Hat Enterprise Linux release 8.0 (Ootpa) 安装依赖 # yum install -y yum-utils device-mapper-persistent-data lvm2 Last metadata expiration check: 0:33:56 ago on Tue 18 Feb 2020 12:30:53 AM UTC. Dependencies resolved. ====…
Gson解析JSON字符串时出现了下面的错误: No-args constructor for class X does not exist. Register an InstanceCreator with Gson for this type to fix this problem. 解决的办法是把对应的Class改成静态类.…
I joined the NodeJS online Course three weeks ago, but now I'm late about 2 weeks. I pay the codeschool yearly subscribed, but I have lost the track long time. I get more weight than expected. I like more and more my MacBook Pro I maybe go to the UST…
Programming Contest Problem Types Hal Burch conducted an analysis over spring break of 1999 and made an amazing discovery: there are only 16 types of programming contest problems! Furthermore, the top several comprise almost 80% of the problems s…
You are given two jugs with capacities x and y litres. There is an infinite amount of water supply available. You need to determine whether it is possible to measure exactly z litres using these two jugs. If z liters of water is measurable, you must…
A city's skyline is the outer contour of the silhouette formed by all the buildings in that city when viewed from a distance. Now suppose you are given the locations and height of all the buildings as shown on a cityscape photo (Figure A), write a pr…
