龍木

未归档

c#(1) codeforces(130) dp(2) map(2) RMQ(1) 一些神奇的东西(1) 三分(1) 前缀和(1) 区间dp(1) 博弈(2) 大数(1) 平面几何(1) 并查集(1) 快数幂(1) 总结(1) 打表(1) 找规律(4) 数学(8) 暴力(1) 最小公约数(1) 最小生成树(1) 杭电(4) 浅谈(8) 深度优先搜索(1) 牛客(10) 组合数(1) 网络流最大流(2) 题解(3)

/ 注册

全部文章 / 未归档（共421篇）

A. Sequence with Digits

链接：https://codeforces.com/contest/1355/problem/A Let's define the following recurrence: an+1=an+minDigit(an)⋅maxDigit(an).an+1=an+minDigit(an)⋅maxDi...

2020-09-15

0 556

D. Game With Array

链接：https://codeforces.com/contest/1355/problem/D Petya and Vasya are competing with each other in a new interesting game as they always do. At the b...

2020-09-15

0 486

C. Count Triangles

链接：https://codeforces.com/contest/1355/problem/C Like any unknown mathematician, Yuri has favourite numbers: AA, BB, CC, and DD, where A≤B≤C≤DA≤B≤C≤D...

2020-09-15

0 679

C2. Not So Simple Polygon Embedding

链接：https://codeforces.ml/contest/1354/problem/C2 The statement of this problem is the same as the statement of problem C1. The only difference is tha...

2020-09-15

0 486

C 序列卷积之和

给出一个长度为{n}n的数组{a_1,a_2,...,a_n}a1,a2,...,an，计算{\sum_{l=1}^n\sum_{r=l}^n\sum_{i=l}^r\sum_{j=i}^r}a_i*a_j∑l=1n∑r=ln∑i=lr∑j=irai∗aj {mod}mod {1e...

2020-09-15

0 397

H 中位因数

链接：https://ac.nowcoder.com/acm/contest/5678/H 来源：牛客网给出函数的定义如下： f(x)是所有能够整除 x 的数（包含 1 和 x ）中的中位数向下取整的大小, g(x)=∑i=1xf(i)g(x)=\sum_{i = 1}^{x}{f(i)}g...

2020-09-15

0 379

C. Game On Leaves

链接https://codeforces.ml/contest/1363/problem/C Ayush and Ashish play a game on an unrooted tree consisting of nn nodes numbered 11 to nn. Players mak...

2020-09-15

0 671

D - Vacation

链接：https://vjudge.net/contest/381756#problem/D Tom and Jerry are going on a vacation. They are now driving on a one-way road and several cars are in ...

2020-09-15

0 543

网络流最大流模板

#include<bits/stdc++.h> using namespace std; typedef long long ll; const int N=200000+10,M=1e4+5,mod=1e9+7; ll n,m,s,t,h[N],cur[N],cnt=1,vis[N];...

2020-09-15

0 429

A Equivalent Prefixes

链接：https://ac.nowcoder.com/acm/contest/6362/A Two arrays u and v each with m distinct elements are called equivalent if and only if RMQ(u,l,r)=RMQ(v,l...

2020-09-15

0 576