题面 一个字符串 T T T 是由一个包含 0.1.? 的字符串 S S S 循环连接 K K K 次获得的. 字符串 T T T 中的每个 ? 都可以换成 0 或 1 ,假设 T T T 中一共有 q q q 个 ? ,那么把这 q q q 个 ? 全部换成 0 或 1 后能得到 2 q 2^q 2q 种不同的 T ′ T' T′ ,现在求 ∑ F ( T ′ ) \sum F(T') ∑F(T′) 即把这 2 q 2^q 2q 个 F ( T ′ ) F(T') F(T′) 算出来并求和.…

KYOCERA Programming Contest 2021(AtCoder Beginner Contest 200) 题解 哦淦我已经菜到被ABC吊打了. A - Century 首先把当前年份减去\(1\),对应的世纪也减去\(1\),然后我们就发现第\(0\)到\(99\)年对应第\(0\)世纪,第\(100\)到\(199\)年对应第\(1\)世纪,以此类推. 答案就是\(\lfloor \frac {N-1} {100} \rfloor\).这里\(\lfloor x \rflo…

前言:果然自己连\(ABC\)都打不好了吗. 没看清题目,卡了巨久,排名一直跌,笔记本键盘坏了,心态崩了. 冷静. ------------------------------------------------------ \(A\) 判断一个年份处于几世纪. A // code by fhq_treap #include<bits/stdc++.h> #define ll long long #define N 300005 inline ll read(){ char C=getchar…

D - 2017-like Number Time limit : 2sec / Memory limit : 256MB Score : 400 points Problem Statement We say that a odd number N is similar to 2017 when both N and (N+1)⁄2 are prime. You are given Q queries. In the i-th query, given two odd numbers li a…

A - Happy Birthday! Time limit : 2sec / Memory limit : 1000MB Score: 100 points Problem Statement E869120's and square1001's 16-th birthday is coming soon.Takahashi from AtCoder Kingdom gave them a round cake cut into 16 equal fan-shaped pieces. E869…

A - ABC/ARC Time limit : 2sec / Memory limit : 256MB Score : 100 points Problem Statement Smeke has decided to participate in AtCoder Beginner Contest (ABC) if his current rating is less than 1200, and participate in AtCoder Regular Contest (ARC) oth…

A - Rating Goal Time limit : 2sec / Memory limit : 256MB Score : 100 points Problem Statement Takahashi is a user of a site that hosts programming contests.When a user competes in a contest, the rating of the user (not necessarily an integer) changes…

A - ABCxxx Time limit : 2sec / Memory limit : 256MB Score : 100 points Problem Statement This contest, AtCoder Beginner Contest, is abbreviated as ABC. When we refer to a specific round of ABC, a three-digit number is appended after ABC. For example,…

没看到Beginner,然后就做啊做,发现A,B太简单了...然后想想做完算了..没想到C卡了一下,然后还是做出来了.D的话瞎想了一下,然后感觉也没问题.假装all kill.2333 AtCoder Beginner Contest 052 A题意: 输出大的面积? 思路: max(A*B,C*D); AtCoder Beginner Contest 052 B题意: 枚举过程,然后...太水了.. AtCoder Beginner Contest 052 C题意: 输出N!的因子个数mod1…

AtCoder Beginner Contest 136 题目链接 A - +-x 直接取\(max\)即可. Code #include <bits/stdc++.h> using namespace std; typedef long long ll; const int N = 2e5 + 5; int main() { ios::sync_with_stdio(false); cin.tie(0); int a, b; cin >> a >> b; cout &…