ATCoder
AtCoder Beginner Contest 307 Ex Marquee
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc307_h "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc307/tasks/abc307_h "AtCoder 传送门") 一开始看错题了，看 ......
AtCoder Beginner Contest(abc) 307
*** ## A - [Weekly Records](https://atcoder.jp/contests/abc307/tasks/abc307_a) #### 题目大意 >小莫每天跑步, 输入n周每天的步数, 输出每周跑的总步数; #### 解题思路 >签到题不多嗦了; #### 神秘代码 ......
AtCoder Beginner Contest 307 G Approximate Equalization
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc307_g "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc307/tasks/abc307_g "AtCoder 传送门") 考虑我们如果确定了 ......
AtCoder Beginner Contest 245 Ex Product Modulo 2
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc245_h "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc245/tasks/abc245_h "AtCoder 传送门") 很好的题。 下文令 ......
AtCoder Beginner Contest 307 ABCDE
# [AtCoder Beginner Contest 307](https://atcoder.jp/contests/abc307) ## **A - Weekly Records** ### Problem Statement 题意：告诉你有几个礼拜，问你每个礼拜走的路程和。 ### Solu ......
AtCoder Beginner Contest 267 ABCDE
# [AtCoder Beginner Contest 267](https://atcoder.jp/contests/abc267) ## **A - Saturday** ### Problem Statement 题意：问你给定的天到礼拜六还要几天。 思路：直接算。 ```c++ #incl ......
AtCoder Beginner Contest 252 Ex K-th beautiful Necklace
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc252_h "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc252/tasks/abc252_h "AtCoder 传送门") ~~不知道为什么可 ......
AtCoder Beginner Contest 307
## [A - Weekly Records (abc307 A)](https://atcoder.jp/contests/abc307/tasks/abc307_a) ### 题目大意 给定$n$周每天的散步量，求每周七天的散步量的和。 ### 解题思路 累计求和即可。 神奇的代码 ```cpp ......
AtCoder Beginner Contest 212(E,F)
# AtCoder Beginner Contest 212(E,F) ## E(dp) [E](https://atcoder.jp/contests/abc212/tasks/abc212_e) 题目大意为有$n$个点，我们需要找到$k+1$个点，用数组$A$表示,其中，$A_i$和$A_{i+ ......
AtCoder Beginner Contest(abc) 299
*** ## A - [Treasure Chest](https://atcoder.jp/contests/abc299/tasks/abc299_a) #### 题目大意 >给定一个由' | ' ' * '和' . '组成的字符串, 并且保证一定有1个' * '和2个' | ', 检查' * ......
AtCoder Regular Contest 154 E Reverse and Inversion
[洛谷传送门](https://www.luogu.com.cn/problem/AT_arc154_e "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/arc154/tasks/arc154_e "AtCoder 传送门") 好题！ 考虑如何更 ......
AtCoder Regular Contest 154 D A + B > C ?
[洛谷传送门](https://www.luogu.com.cn/problem/AT_arc154_d "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/arc154/tasks/arc154_d "AtCoder 传送门") **看到这种题，应 ......
AtCoder Regular Contest 154 C Roller
[洛谷传送门](https://www.luogu.com.cn/problem/AT_arc154_c "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/arc154/tasks/arc154_c "AtCoder 传送门") 被这题干爆了![] ......
【题解】AtCoder-ABC306G Return to 1
这也太强了！ 容易想到的是用若干环拼出这个 $10^{10^{100}}$，也就是这些环的 $\gcd \mid 10$。 之后就不会了。 先正图反图两次 DFS，只留下 $1$ 所在强连通分量里的边，对正图跑 DFS 生成树，定义其深度从 $0$ 开始，然后有一个结论是：对于任何正整数 $a$，图 ......
AtCoder Beginner Contest 174
# A - Air Conditioner ```cpp #include using namespace std; int main() { int x; cin >> x; if( x >= 30 ) cout using namespace std; #define int long long ......
AtCoder Beginner Contest 229(F,G)
# AtCoder Beginner Contest 229(F,G) ## F(二部图,dp) [F](https://atcoder.jp/contests/abc229/tasks/abc229_f) 这个题大致是给你$n+1$个点，为$0$到$n$,然后$n$条边是点$0$到$1...n$这 ......
AtCoder Beginner Contest(abc) 306
*** ### A - [Echo](https://atcoder.jp/contests/abc306/tasks/abc306_a) #### 题目大意 >把一个字符串的每个字符输出两遍 #### 解题思路 >签到题不多嗦了; #### 神秘代码 ```c++ #include #define ......
AtCoder Beginner Contest(abc) 305
*** ### A - [Water Station](https://atcoder.jp/contests/abc305/tasks/abc305_a) #### 题目大意 >给定一个0~100之间的数, 输出离它最近的5的倍数 #### 解题思路 >签到题不多嗦了; #### 神秘代码 ``` ......
AtCoder Regular Contest 162 F Montage
[洛谷传送门](https://www.luogu.com.cn/problem/AT_arc162_f "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/arc162/tasks/arc162_f "AtCoder 传送门") 题目限制可以被改写 ......
AtCoder Beginner Contest 302 ABCDEF
[AtCoder Beginner Contest 302](https://atcoder.jp/contests/abc302)  [AtCoder 传送门](https://atcoder.jp/contests/arc162/tasks/arc162_e "AtCoder 传送门") 完全没有思路。但是 ......
AtCoder Regular Contest 162 D Smallest Vertices
[洛谷传送门](https://www.luogu.com.cn/problem/AT_arc162_d "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/arc162/tasks/arc162_d "AtCoder 传送门") 注意到，如果给定每 ......
AtCoder Beginner Contest 235 Ex Painting Weighted Graph
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc235_h "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc235/tasks/abc235_h "AtCoder 传送门") 为啥洛谷唯一一篇题 ......
AtCoder Beginner Contest(abc) 304
*** ### A - [First Player](https://atcoder.jp/contests/abc304/tasks/abc304_a) #### 题目大意 >顺时针给定一个序列, 序列的元素由一个字符串和一个数字组成; 我们需要从有最小数字的元素开始, 顺时针遍历整个序列, 并输 ......
AtCoder Regular Contest 141 E Sliding Edge on Torus
[洛谷传送门](https://www.luogu.com.cn/problem/AT_arc141_e "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/arc141/tasks/arc141_e "AtCoder 传送门") $(i, j) \ ......
AtCoder Beginner Contest 303 ABCDE
# [AtCoder Beginner Contest 303](https://atcoder.jp/contests/abc303) ## A - Similar String ### Problem Statement 题意：给你两个串判断是不是相似的。 相似：不一样的字符中1和l相似，0和o ......
AtCoder Beginner Contest(abc) 300
*** ### A - [N-choice question](https://atcoder.jp/contests/abc300/tasks/abc300_a) #### 题目大意 >从n个数里面找出a+b的结果 #### 解题思路 >签到题不多嗦了 #### 神秘代码 ```c++ #incl ......
AtCoder Regular Contest 162
### [A](https://atcoder.jp/contests/arc162/tasks/arc162_a) 答案即后缀最小值个数。 时间复杂度 $\mathcal{O}(n)$。 提交记录：[Submission #42717665 - AtCoder Regular Contest 16 ......
AtCoder Beginner Contest 220 H Security Camera
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc220_h "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc220/tasks/abc220_h "AtCoder 传送门") 看到数据范围猜复杂 ......