counting atcoder another 259h

HDL刷题:Count clock

[原题链接](https://hdlbits.01xz.net/wiki/Count_clock) 要写一个12小时的时钟。 由题目得知,reset信号的优先级最高,其次是enable,这里很好实现。 我的思路: 写了一个4位的bcd计数器,并实例化了4个,对ss与mm的[7:4]与[3:0]分别考 ......
Count clock HDL

G. Counting Graphs

G. Counting Graphs Given a tree consisting of $n$ vertices. A tree is a connected undirected graph without cycles. Each edge of the tree has its weigh ......
Counting Graphs

Atcoder ABC307_G-Approximate Equalization 序列dp

# [AT_ABC307_G-Approximate Equalization](https://atcoder.jp/contests/abc307/tasks/abc307_g "ABC307_G") [没想到还有Approximate Equalization II !!:AT_ABC313_ ......

AtCoder-ARC073_A Sentou

Sentou 【题意】: 有一个开关,当按下开关后的 T 秒内会一直放水,当在放水状态时,如果有人再次按下开关,那么停止放水,并从按下的那一刻起的 T 秒会再次一直放水,给出 n 个人按压开关的时间,问总共流出多少水 【思路】: 简单模拟 #include <bits/stdc++.h> using ......
AtCoder-ARC AtCoder Sentou ARC 073

DataFrame 计数value_counts 后转成df

import pandas as pd # 创建示例 DataFrame data = {'Category': ['A', 'B', 'A', 'C', 'A', 'B', 'C', 'A', 'B']} df = pd.DataFrame(data) # 使用 value_counts() 方法 ......
value_counts DataFrame counts value

AtCoder Beginner Contest 313

AtCoder Beginner Contest 313 A - To Be Saikyo 思路:找到最大的,和第一个比较 #include<bits/stdc++.h> using namespace std; #define int long long //#define int __int12 ......
Beginner AtCoder Contest 313

AtCoder Beginner Contest 313

# [AtCoder Beginner Contest 313 - AtCoder](https://atcoder.jp/contests/abc313) ## [A - To Be Saikyo (atcoder.jp)](https://atcoder.jp/contests/abc313/t ......
Beginner AtCoder Contest 313

取数游戏 Atcoder-abc128_d

枚举两端取了几个数,将手中的负数从小到大放回序列即可 ``` #include using namespace std; int n, m, a[55], c[55], ans = -0x7fffffff; int main() { scanf("%d%d", &n, &m); for (int i ......
Atcoder-abc Atcoder 128 abc

Atcoder Grand Contest 058 F - Authentic Tree DP

考虑给 $f(T)$ 赋予组合意义。一个直观的想法是,在每条边中间新建一个节点,然后每次选择一条边对应的点,然后把它删掉,递归剩余的两个部分,但是你会发现这样分母不对,应该是 $n$ 但在这个模型里只有 $n-1$。 考虑魔改这个模型。我们在每个边对应的点下面添加 $998244352$ 个点,你发 ......
Authentic Atcoder Contest Grand Tree

Atcoder ABC313_C-Approximate Equalization 2

# [AT_ABC313_C-Approximate Equalization 2](https://atcoder.jp/contests/abc313/tasks/abc313_c "ABC313_C") ## Description: - 给定一个整数序列 $A=(A_1,A_2,···,A_ ......

mysql sum()按条件求和、count()按条件计数

建议看:https://www.cnblogs.com/Marydon20170307/p/15913081.html 相关题目:[各个视频的平均完播率\_牛客题霸\_牛客网](https://www.nowcoder.com/practice/96263162f69a48df9d84a93c710 ......
条件 mysql count sum

Atcoder Beginner Contest 313

## [C](https://atcoder.jp/contests/abc313/tasks/abc313_c) > ## [D](https://atcoder.jp/contests/abc313/tasks/abc313_d) ## [E](https://atcoder.jp/contes ......
Beginner Atcoder Contest 313

AtCoder Beginner Contest 313

# A - To Be Saikyo ```cpp #include using namespace std; int main(){ ios::sync_with_stdio(0),cin.tie(0); int n; cin >> n; vector a(n); for( auto & i : ......
Beginner AtCoder Contest 313

「解题报告」AtCoder Beginner Contest 313

比赛地址:[AtCoder Beginner Contest 313 - AtCoder](https://atcoder.jp/contests/abc313) 后记:**请正确理解题意后再做题!!!** ## A - To Be Saikyo [A - To Be Saikyo (atcoder ......
Beginner AtCoder Contest 报告 313

CF1556G Gates to Another World

***3300** 这种 $2 ^ n$ 和区间,看着就很想套上线段树,事实上是对的。 **引理 1 :** > 在线段数内同一颗子树内的点可以互相到达。 这个是非常容易验证的,把边画出来就是在一条链上挂若干条横着的链。 然后我们考虑把区间挂上去,然后用**时光倒流**转化为加边。我们发现,我们可以 ......
Another 1556G Gates World 1556

AtCoder Beginner Contest (ABC) 313 D-E

Tasks - AtCoder Beginner Contest 313 PS:当时看到D过的比E多就一直在考虑D,但还没做出来,其实个人感觉E比D简单。 D - Odd or Even 交互题。有n个数,最多可以询问n次然后要求判断出这n个数的奇偶性。每次可以询问数组里任意k个元素的和是不是奇数 ......
Beginner AtCoder Contest ABC 313

AtCoder Beginner Contest 313

# AtCoder Beginner Contest 313 ## G - Redistribution of Piles ### 题意翻译: 给定一个数列$a_i(a_i>0, i\in[1,n])$,和一个数$s$(初值为0),有两种操作 - A - 全局非零数减一,减去的和加到$s$ - B ......
Beginner AtCoder Contest 313

AtCoder Beginner Contest 313 A-E Code

比赛链接:AtCoder Beginner Contest 313 - AtCoder A: #include <bits/stdc++.h> using namespace std; int main() { cin.tie(0); ios::sync_with_stdio(false); int ......
Beginner AtCoder Contest Code 313

AtCoder Beginner Contest 313

> ~~貌似这次很难,还好去吃烧烤了~~ ## [A - To Be Saikyo (abc313 A)](https://atcoder.jp/contests/abc313/tasks/abc313_a) ### 题目大意 给定$n$个数$a_i$,问第一个数要成为唯一的最大的数,应该加多少。 ......
Beginner AtCoder Contest 313

[LeetCode] 1351. Count Negative Numbers in a Sorted Matrix 统计有序矩阵中的负数

Given a `m x n` matrix `grid` which is sorted in non-increasing order both row-wise and column-wise, return *the number of **negative** numbers in* `g ......
负数 矩阵 LeetCode Negative Numbers

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

Toyota Programming Contest 2023#4(AtCoder Beginner Contest 311)

# Preface 补下好久之前打的比赛博客 这场前面都写的挺稳的,然后一到G就降智了没写出来 # A - First ABC 签到 ```cpp #include #include #include #include #include #include #include #include #inc ......
Contest Programming Beginner AtCoder Toyota

nfls15095 Atcoder-abc123_d 蛋糕

Atcoder-abc123_d AT 小卖部从下学期开始售卖带有数字形状的蛋糕,$X$,$Y$ 和 $Z$ 种蛋糕分别带有 $1$ 形,$2$ 形和 $3$ 形蜡烛,而且每个蛋糕都有美味值,如下所示: - 带有 $1$ 形蜡烛的美味值有: $A_1,A_2,\cdots,A_X$ - 带有 $2$ ......
Atcoder-abc 蛋糕 Atcoder 15095 nfls

Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array

今天在安装attachments插件时后台提示Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array in 64,这个是用php8开发经常会碰到的一个错误,如何解决呢?随ytkah一起来看看 ......
TypeError Countable Uncaught Argument count

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

Practice on Codeforces and Atcoder in May

# CF补题题解2023.5 说明:CF题直接去luogu看翻译,AT题会附上简要题意 ## [CF1821E](https://codeforces.com/contest/1821/problem/E) 先考虑如何高速计算权值 一个显而易见的贪心是尽量在右边取括号消除,设右括号为 1,左括号为 ......
Codeforces Practice Atcoder May and

UNIQUE VISION Programming Contest 2023 Summer(AtCoder Beginner Contest 312)

# Preface 最唐氏的一集,尽情欣赏ABC E题战俘的丑态 这场打的时候就很抽象,各种傻逼错误频发,从B题一路WA到G题 还好发现E后面的题更简单后马上把FG写了,不然要爆炸了 # A - Chord 签到 ```cpp #include #include #include #include ......
Contest Programming Beginner AtCoder UNIQUE

AtCoder Beginner Contest 165

# AtCoder Beginner Contest 165 https://atcoder.jp/contests/abc165 ## C - Many Requirements dfs ```CC #include using namespace std; const int N = 15, M ......
Beginner AtCoder Contest 165

AtCoder Beginner Contest 312

# A - Chord ```cpp #include using namespace std; int32_t main() { ios::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr); string s; cin >> s ......
Beginner AtCoder Contest 312