- 博客(103)
- 资源 (2)
- 收藏
- 关注
RSS订阅
原创 ICPC南京站 Problem M. Monster Hunter(树上DP)
题目链接: Monster Hunter.树上DP,本来以为复杂度n3，实际上复杂度是n2的,因为树上每两个节点 x , y ,他们仅会在 lca(x , y)的时候会被#include<bits/stdc++.h>using namespace std;const int maxn = 2e3+9;#define inf 0x3f3f3f3f3f3f3f3fvector<long long>edge[maxn];long long val[maxn],Size[m
2020-12-21 21:03:27
565
原创 2020ccpc长春(Strange Memory)
Strange MemoryOnce there was a rooted tree. The tree containednnodes, which were numbered1,…,n. The node numbered1was the root of the tree. Besides, every nodeiwas assigned a numberai. Your were surprised to find that there were several pai...
2020-11-09 20:55:55
813
原创 Exponial Kattis - exponial(欧拉降幂)
降幂公式：模板题:Exponial .计算:exponial(n)%m 1<= n,m <= 109+7exponial(n) = n^ (n-1^ ( n-2^ ( n-3^ (n-4^ (…^ 1))))详情看代码注释#include<bits/stdc++.h>using namespace std;#define inf (long long)0x3f3f3f3flong long tmp;long long euler(long long n)/
2020-06-01 21:41:47
270
原创 Lomsat gelral CodeForces - 600E（树上启发式合并）
Lomsat gelral CodeForces - 600EYou are given a rooted tree with root in vertex 1. Each vertex is coloured in some colour.Let’s call colour c dominating in the subtree of vertex v if there are no other colours that appear in the subtree of vertex v more t
2020-05-28 11:24:54
271
原创 travel Gym - 247728H(树形DP)
travel Gym - 247728HWhite Cloud has a tree with n nodes.The root is a node with number 1. Each node has a value.White Rabbit wants to travel in the tree 3 times. In Each travel it will go through a path in the tree.White Rabbit can’t pass a node more th
2020-05-26 14:36:50
212
原创 【美团杯2020】平行四边形(原根)
【美团杯2020】平行四边形蒜斜非常喜欢下围棋。自从AlphaOg面世以来，他就立志一定要研究出AlphaOg的破绽。 终于，他发现当AlphaOg遇到一种特殊局面后，它的神经网络会自动输出“投降”！随着进一步的研究，蒜斜发现这种局面有着更一般的特性，不仅仅局限于固定大小棋盘。 具体来说，当棋盘大小是 n（n+1 是一个质数）且棋盘上恰好有 n 个棋子的时候，如果这些棋子的位置满足下列条件，那么 AlphaOg 就会直接投降。假设第 i 个棋子的位置是点 Pi，处在第 xi 行第 yi 列，那么这些坐标
2020-05-19 09:50:01
349
原创 Symmetric Matrix Gym - 247727B
Symmetric Matrix Gym - 247727BCount the number of n×n matrices A satisfying the following condition modulo m.Ai,j∈{0,1,2} for all 1≤i,j≤n.Ai,j=Aj,i for all 1≤i,j≤n.Ai,1+Ai,2+⋯+Ai,n=2 for all 1≤i≤n.A1,1=A2,2=⋯=An,n=0.InputThe input consists
2020-05-18 21:23:21
247
原创 Monotonic Matrix Gym - 247727A
Monotonic Matrix Gym - 247727ACount the number of n×m matrices A satisfying the following condition modulo (109+7).Ai,j∈{0,1,2} for all 1≤i≤n,1≤j≤m.Ai,j≤Ai+1,j for all 1≤i<n,1≤j≤m.Ai,j≤Ai,j+1 for all 1≤i≤n,1≤j<m.InputThe input consists
2020-05-15 22:25:17
314
原创 张老师的旅行(区间dp)
张老师的旅行链接：https://ac.nowcoder.com/acm/contest/5477/C来源：牛客网时间限制：C/C++ 1秒，其他语言2秒空间限制：C/C++ 262144K，其他语言524288K64bit IO Format: %lld题目描述张老师到了一个王国去旅游，王国有n个景点，张老师到达这个城市所在的车站恰好位于第x个景点，这个王国非常特别，恰好所有著名的景点都在分布在直线上，每个景点在坐标pi上(单位：公里)，张老师身体非常好，每走一公里花费一分钟。每个景点都有一
2020-05-12 11:29:53
346
原创 Scout YYF I (POJ - 3744)(概率dp+矩阵快速幂)
Scout YYF I POJ - 3744YYF is a couragous scout. Now he is on a dangerous mission which is to penetrate into the enemy’s base. After overcoming a series difficulties, YYF is now at the start of enemy’s famous “mine road”. This is a very long road, on which
2020-05-08 22:38:43
307
原创 Nature Reserve(最小生成森林)
Nature ReserveKattis - naturereserveIn a Nature Reserve and Wildlife Park, there are NNN environmental monitoring stations to monitor temperature, atmospheric pressure, humidity, fire, water quality...
2020-04-26 17:01:54
2558
原创 codeforces 55D Beautiful numbers(数位DP)
Beautiful numbersVolodya is an odd boy and his taste is strange as well. It seems to him that a positive integer number is beautiful if and only if it is divisible by each of its nonzero digits. We w...
2020-04-22 14:18:31
209
原创 牛客Talk(概率dp)
题目描述众所周知，牛可乐 的口胡能力十分强大.牛可乐 要讲 n 件事情，我们把这些事情从 1∼n 标号。牛可乐每讲一件事需要耗费一个单位的时间，但是 牛可乐讲事情和普通人不同：牛可乐在 讲完 第 i 件事时，只有 pi 的概率继续讲下一件事（第 i+1 件），也就是说，牛可乐讲完第 i 件事后有 (1-pi) 的概率从第 i-1 件事开始讲！当 牛可乐讲完第 n 件事，并且决定讲下一件事时，牛...
2020-04-20 22:54:21
392
原创 Eugene and an array(思维)
Eugene and an arraytime limit per test:1.5 secondsmemory limit per test:256 megabytesinput:standard inputoutpu:tstandard outputEugene likes working with arrays. And today he needs your help in so...
2020-04-15 23:09:00
319
原创 Hexagonal Rooks 计蒜客（模拟）
Hexagonal Rooks 计蒜客 - 43472It is game night and Alice and Bob are playing chess. After beating Bob at chess several times, Alice suggests they should play a chess variant instead called hexagonal che...
2020-03-25 22:33:19
276
原创 Deceptive Dice （规律）
Deceptive Dice 计蒜客 - 43468Recently your town has been infested by swindlers who convince unknowing tourists to play a simple dice game with them for money. The game works as follows: given is an n-si...
2020-03-25 22:14:16
888
原创 Canyon Crossing(二分+bfs)
Canyon Crossing 计蒜客 - 4346764000KThe Bridge And Passageway Creators are responsible for making new paths through the local mountains. They have approved your plan to build a new route through your f...
2020-03-25 21:58:23
294
原创 后缀自动机
#include<bits/stdc++.h>using namespace std;const int maxn = 2e6+9;//一般有2n个等价类int tot=1,las=1;char s[maxn];long long ans=0;struct NODE{ int ch[26]; int len,fa; NODE() { ...
2020-02-07 17:22:47
176
原创 区间dp
1022 石子归并 V2N堆石子摆成一个环。现要将石子有次序地合并成一堆。规定每次只能选相邻的2堆石子合并成新的一堆，并将新的一堆石子数记为该次合并的代价。计算将N堆石子合并成一堆的最小代价。例如： 1 2 3 4，有不少合并方法1 2 3 4 => 3 3 4(3) => 6 4(9) => 10(19)1 2 3 4 => 1 5 4(5) =&g...
2020-02-04 15:52:59
182
原创 Number Game (博弈) Gym - 101653Q
Alice and Bob are playing a game on a line of N squares. The line is initially populated with one of each of the numbers from 1 to N. Alice and Bob take turns removing a single number from the line, s...
2020-02-04 11:35:56
471
原创 Flying Squirrel Gym - 102091A （ST表）
https://vjudge.net/contest/351286#problem/A题意:１～n位置有不同高度的柱子，一直飞鼠只能从一个柱子飞到高度严格比它小的柱子；给定n个柱子的高度 ，m次询问:1.从一个柱子最多能飞到多少个柱子上，2.从一个柱子到另一个柱子最多能飞多少次RMQ查询区间最大值对于第一种询问dfs求最多路径，把相同高的柱子视为分隔点，相同高的柱子在分隔点之间往下...
2020-01-13 20:38:52
246
原创 Charles in Charge Gym - 101490E (队列优化dij＋二分)
https://vjudge.net/contest/350975#problem/E题意：给一张无向图，求一条从1到n路上的最大边,使得其最小，同时还要满足 这条路长度<=最短路*(1+X%)先跑一边最短路，求出最短路然后二分答案，求在最大边为mid的情况下的最短路(在松弛的时候判断一下边大于mid就不松弛),用spfa Ｔ了,得用队列优化dij#incl...
2020-01-11 09:20:56
254
原创 点分治（模板）
TreePOJ - 1741Give a tree with n vertices,each edge has a length(positive integer less than 1001).Define dist(u,v)=The min distance between node u and v.Give an integer k,for every pair (...
2019-12-20 10:28:47
115
原创 树的重心
最大子树最小的节点#include<bits/stdc++.h>using namespace std;const int maxn = 1e5;int vis[maxn],Size[maxn];void dfs(int x){ vis[x] = 1; Size[x] = 1; int max_part = 0; for(int i ...
2019-12-19 15:21:24
87
原创 树链剖分
https://www.luogu.com.cn/problem/P3384#include<bits/stdc++.h>using namespace std;const int maxn = 5e5+10;#define lson num<<1#define rson num<<1|1#define mid ((l+r)>>1...
2019-11-26 18:19:21
90
原创 Equidistant Gym - 102411E
In 2019 ICPC subregions structure was changed a little. Now for each subregion, we need to choose the best place for the subregion finals. To make things fair we want to choose a city in such a way th...
2019-11-05 19:59:33
1054
原创 倍增LCA
//求最近公共祖先#include<bits/stdc++.h>using namespace std;const long long maxn = 5e5+10;struct node{ long long to,next;} edge[maxn*2];long long cnt,deep[maxn],fa[maxn][50],head[maxn],lg[m...
2019-11-05 09:12:55
162
原创 P3810 陌上花开(三维偏序,cdq分治模板)
https://www.luogu.org/problem/P3810//第一维排序，第二维cdq分治，第三维树状数组#include<bits/stdc++.h>using namespace std;#define lowbit(x) (x&-(x))const int maxn = 200006;int a[200009],ans[200009];...
2019-10-31 18:23:25
161
原创 Research Productivity Index
Research Productivity IndexKattis - researchproductivityindexAngela is a new PhD student and she is nervous about the upcoming paper submission deadline of this year’s research conference. She h...
2019-10-28 15:26:57
464
原创 Tree with Maximum Cost（树形DP）
You are given a tree consisting exactly ofnnvertices. Tree is a connected undirected graph withn−1n−1edges. Each vertexvvof this tree has a valueavavassigned to it.Letdist(x,y)dist(x,y)...
2019-10-28 15:23:01
248
原创 P2522 [HAOI2011]Problem b（Mobius经典题目）
题目描述对于给出的n个询问，每次求有多少个数对(x,y)，满足a≤x≤b，c≤y≤d，且gcd(x,y) = k，gcd(x,y)函数为x和y的最大公约数。输入格式第一行一个整数n，接下来n行每行五个整数，分别表示a、b、c、d、k输出格式共n行，每行一个整数表示满足要求的数对(x,y)的个数输入输出样例输入22 5 1 5 11 5 1 5 2输出...
2019-10-25 20:34:44
134
原创 Master of Phi HDU - 6265（数论）
Problem B. Master of PhiYou are given an integer n. Please output the answer of ∑ d|n φ(d) × n d modulo 998244353. n is represented in the form of factorization.φ(n) is Euler’s totient function, a...
2019-10-24 11:22:42
264
原创 莫比乌斯反演
莫比乌斯函数：设，其中p为素数，则定义如下：线性筛求莫比乌斯函数：#include<bits/stdc++.h>using namespace std;int mu[120000],vis[120000],prime[120000],cnt;void mbws(int n){ mu[1] = 1; cnt = 0; for...
2019-10-23 14:28:12
231
原创 Angle Beats Gym - 102361A
Angle BeatsGym - 102361AGivennnpointsP1,P2,⋯,PnP1,P2,⋯,Pnon 2D plane andqqqueries. Inii-th query, a pointAiAiis given, and you should determine the number of tuples(u,v)(u,v)that1≤u&...
2019-10-15 08:55:05
295
原创 Hungry Canadian Gym - 101484G
Hungry CanadianGym - 101484GTeodoro just moved to Canada. He is having a hard time there as the cost of living is higher than he expected. He is short on money so he decided to eat a string, ...
2019-09-27 19:36:39
189
原创 Jokewithpermutation Gym - 100553J (bfs)
JokewithpermutationGym - 100553JJoey had saved a permutation of integers from 1 to n in a text file. All the numbers were written asdecimal numbers without leading spaces.Then Joe made a pr...
2019-09-26 10:54:01
217
原创 Largest Allowed Area(二维前缀和＋二分)
Largest Allowed AreaGym - 102091LA company is looking for land to build its headquarters. It has a lot of money and can buy asmany land patches as it needs. Its goal, however, is finding the la...
2019-09-17 10:17:20
269
原创 Fear Factoring(分块)
Problem C — limit 1 secondFear FactoringThe Slivians are afraid of factoring; it’s just, well, difficult.Really, they don’t even care about the factors themselves, just how much they sum to.We can...
2019-09-06 19:58:20
366
原创 Interesting Integers (扩展欧几里得)
https://cn.vjudge.net/contest/322620#problem/It组输入，给定一个数n，求出最小的a,b (a<b)，使得以a,b为开头的斐波那契数列包含n两个斐波那契数列的和也是斐波那契数列先写出两个以 1,0 和0,1开头的数列a[ ] = 1,0,1,2,3,5,8,13,21,34,55b[ ] = 0,1,1,2,3,...
2019-08-29 16:03:36
365
原创 Log Concave Sequences(矩阵快速幂求递推)
Log Concave SequencesGym - 102302HA sequence of numbersAis said to be logarithm concave if, and only if, for every2 ≤ i ≤ n - 1,ai - 1 * ai + 1 ≤ ai2.For example the sequenceA = (1, 2, 3)...
2019-08-28 15:21:59
635
空空如也
TA创建的收藏夹 TA关注的收藏夹
TA关注的人