codeforces 1864e guess game

Practice on Codeforces and Atcoder in August

## [Educational Codeforces Round 151 A~E](https://www.cnblogs.com/oierpyt/p/17598936.html) ## [Codeforces Round #879 Div.2](https://www.cnblogs.com/oi ......
Codeforces Practice Atcoder August and

Educational Codeforces Round 151 (Rated for Div. 2) 题解

# A. Forbidden Integer 显然,当 $x\not=1$ 时,直接输出 $n$ 个 $1$ 即可 否则,如果 $n$ 为奇数,那就输出 $\lfloor\frac{n}{2}\rfloor-1$ 个 $2$ 和 $3$;如果 $n$ 为偶数,那就输出 $\frac{n}{2}$ 个 ......
题解 Educational Codeforces Round Rated

Codeforces Round 776 (Div. 3)(vp)

# [Dashboard - Codeforces Round 776 (Div. 3) - Codeforces](https://codeforces.com/contest/1650) ## A Deletions of Two Adjacent Letters **题意:看看与题目给的字符一 ......
Codeforces Round 776 Div vp

Codeforces Round 882 (Div. 2)

[link](https://codeforces.com/contest/1847) 题号:CF1847A~F ## [A](https://codeforces.com/contest/1847/problem/A) 题意: 给定一个数组 $\{x_1,x_2,\cdots,x_n\}$ 和一个 ......
Codeforces Round 882 Div

Codeforces 1850H:The Third Letter 带权并查集

# [1850H.The Third Letter](https://codeforces.com/contest/1850/problem/H "Codeforces 1850H") ## Description: - $n$ 个人,$m$ 个条件,每次给出两个人 $a_i$ 和 $b_i$ 一维 ......
Codeforces Letter 1850H Third 1850

Codeforces Round 882 (Div. 2)

# [Codeforces Round 882 (Div. 2)](https://codeforces.com/contest/1847) ## [A.The Man who became a God](https://www.luogu.com.cn/problem/CF1847A) ### 题 ......
Codeforces Round 882 Div

Codeforces Round 424 (Div. 1)D. Singer House

[传送门](https://codeforces.com/problemset/problem/830/D) 显然要自底向上进行$dp$ 深度相同的子树结构相同所以可以利用深度来代表子树。 那么就应该统计出有向路径的个数。 考虑路径由链所拼成。那么状态里应该有有向链的条数。 设$f_{i,j}$表示 ......
Codeforces Singer Round House 424

[安洵杯 2019]game

## [安洵杯 2019]game 将文件放入IDA中打开,查看**main()**函数 ![image-20230713103733078](https://img2023.cnblogs.com/blog/2957075/202307/2957075-20230713151815759-6416 ......
2019 game

Codeforces Round 827 (Div. 4)

# [Dashboard - Codeforces Round 827 (Div. 4) - Codeforces](https://codeforces.com/contest/1742) ## A Sum 简单题 ```c++ void solve() { int a, b, c; cin >> ......
Codeforces Round 827 Div

Codeforces 1855B:Longest Divisors Interval 最长的连续约数区间

# [1855B.Longest Divisors Interval](https://codeforces.com/contest/1855/problem/B "Codeforces 1855B") ## Description: - 对于一个整数 $n$ $(1\leq n \leq 10^{ ......
约数 区间 Codeforces Divisors Interval

games101 HomeWork7

# Games101 HomeWork7 ## 导航 [导航](https://www.cnblogs.com/zhywyt/p/17576370.html) ## 多线程 **这次的作业,我想先教大家实现多线程,再进行操作。多线程多我的吸引力实在是太大了。废话不多说,我们直接开始:** **多线程 ......
HomeWork7 HomeWork games 101

Codeforces Round 449 (Div. 1) D. Nephren Runs a Cinema 卡特兰数

[luogu链接](https://www.luogu.com.cn/problem/CF896D) 题意不再赘述。 优先枚举的应该是$VIP$用户,枚举范围应该是$[0,n-l]$ 之后总客户数为$s=n-i$ 再考虑枚举$100$的总人数为$x$ 则要求$s-2x\in [l,r]$ 这部分方案 ......
卡特兰 Codeforces Nephren Cinema Round

Educational Codeforces Round 38 C- F

# Educational Codeforces Round 38 C - F https://codeforces.com/contest/938 今天写出了三题ovo ## C. Constructing Tests 多画几个图就能发现,对于 $n\times n$ 的正方形来说,要使得 $m\ ......
Educational Codeforces Round 38

Codeforces Round 887 (Div. 1)

# Preface 补一篇好久之前打的CF的博客,说实话其实B题我当时怎么想的已经忘的七七八八了 这场第一眼看A没啥思路,就先去把B这个构造写了,中间想了挺久的大概40min才写出来 然后回头一看A发现可以倒着做,就是个丁真题了然后15min写完 后面看C刚开始以为是个贪心,后面又感觉是个DP,但状 ......
Codeforces Round 887 Div

Codeforces Round #879 Div.2

[link](https://codeforces.com/contest/1834) 前言:VP了一把,rk731,如果赛上有这发挥就好了。 果然,D是分水岭,一直都是。 ## [Unit Array](https://codeforces.com/contest/1834/problem/A) ......
Codeforces Round 879 Div

Educational Codeforces Round 88

# A. Berland Poker 先尽可能的吧小丑给一个人,在把剩下的小丑尽可能的平分,最后计算差值即可。 ```cpp #include using namespace std; void solve() { int n, m, k, t; cin >> n >> m >> k, t = n ......
Educational Codeforces Round 88

Educational Codeforces Round 104

https://codeforces.com/contest/1487 # A. Arena 统计与最小值不同的数字数量。 ```cpp #include using namespace std; #define int long long const int M = (1 > n; vector ......
Educational Codeforces Round 104

Codeforces Round 889 (Div. 2) A-E

[传送门,不用谢。](https://codeforces.com/contest/1855) A 给出排列每次可以交换两个数字,求最少多少次使得排列为错排。 考虑在原位的数字个数为$cnt$ 则答案显然为$(cnt+1)>>1$ B 求一个最大区间满足其中说有数字被$n$整除 极其有趣,注意到样例 ......
Codeforces Round 889 A-E Div

Codeforces Round 889 (Div. 2) A-D

## A. Dalton the Teacher 题意:给出一个排列,问使得排列变为1,2,...,n的最小的交换操作次数 ### Solution 统计a[i]!=i的个数,答案就是除以二向上取整 ```c++ void solve() { int n;cin>>n; int res=0; for ......
Codeforces Round 889 A-D Div

Educational Codeforces Round 36 (Rated for Div. 2)

# Educational Codeforces Round 36 (Rated for Div. 2) https://codeforces.com/contest/915 浓浓ds味的一场edu ## A. Garden 找最大因子 ```CC #include using namespace ......
Educational Codeforces Round Rated Div

Educational Codeforces Round 152 (Rated for Div. 2)

# Preface 经典秒完SB题然后开始坐牢1h,写了个E的假算法T在24个点就不管了打lol去了 妈的怎么稍微难点的题就是想不到呢 # A. Morning Sandwich 签到 ```cpp #include #include #include #include #include #incl ......
Educational Codeforces Round Rated 152

Codeforces Round 889 (Div. 2)

# [Codeforces Round 889 (Div. 2)](https://codeforces.com/contest/1855) ## T1 ​ 思路:我们将 $i \ne p_i$ 的数量记下来,再判断这个数的奇偶性,如果为偶,那么答案就为这个数 / 2,如果为奇,那么就是这个数 / ......
Codeforces Round 889 Div

Codeforces Round 885 (Div. 2) 题解

# A. Vika and Her Friends 看一下样例就可以发现,Vika 以及她的朋友都不能走对角线,在这种情况下 Vika 和朋友的距离为 **偶数**,且朋友一定追不上 Vika 所以直接判断 Vika 和朋友的距离是否都为偶数即可 # B. Vika and the Bridge 显 ......
题解 Codeforces Round 885 Div

Codeforces Round 887 (Div. 2)

# [Codeforces Round 887 (Div. 2)](https://codeforces.com/contest/1853) ## [A. Desorting](https://codeforces.com/contest/1853/problem/A) ### 题目大意 给出一个长 ......
Codeforces Round 887 Div

Codeforces Round 885 (Div. 2)

# [Codeforces Round 885 (Div. 2)](https://codeforces.com/contest/1848) ## [A. Vika and Her Friends](https://codeforces.com/contest/1848/problem/A) ### ......
Codeforces Round 885 Div

Codeforces Round 885 (Div. 2)

# Codeforces Round 885 (Div. 2) ## A. Vika and Her Friends ​ 考虑 Vika 和其中一个朋友的距离,Vika 走一步,他们的距离要么加一要么减一;朋友也一样。那么每秒后他们的距离,要么不变,要么 ±2。那么与 Vika 距离为奇数的朋友,永 ......
Codeforces Round 885 Div

Codeforces Round 887 (Div. 2)

# Codeforces Round 887 (Div. 2) ## T1 ​ 如果已经是无序直接输出零,如果有序, 找到前后相差最小的两个数, 答案 $$ ans = \min\{a_{i+1}-a_i\}/2+1 $$ ## T2 ​ 给定 $n$ 和 $k$ ,问有多少单调不降且非负的斐波那契 ......
Codeforces Round 887 Div

Practice on Codeforces and Atcoder in July

## [$1844E$](https://codeforces.com/problemset/problem/1844/E) 题意: 定义一个矩形 $a$ 是好的,当且仅当其满足以下条件: 1. 矩形中每一个元素 $x$ 都为 $A,B,C$ 其中之一 2. 每一个 $2\times 2$ 的子矩形 ......
Codeforces Practice Atcoder July and

Practice on Codeforces and Atcoder in June

# $Practice$ $on$ $codeforces$ $in$ $June$ wk,误删了4个题,但我不想补了 ## [$CF1839D$](https://codeforces.com/contest/1839/problem/D) 题意:给一个正整数序列 $a$,给定 $k$ 个 0,将 ......
Codeforces Practice Atcoder June and

Educational Codeforces Round 151 A~E

前言:F是个FFT,不想写。 ## [A-Forbidden Integer](https://www.luogu.com.cn/problem/CF1845A) 你需要构造一个正整数序列,满足: 1. 对于 $i$,$a_i\le k$ 且 $a_i\not=x$。 2. $\sum a_i=n$ ......
Educational Codeforces Round 151