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全部文章 / 赛后补题（共22篇）

2019牛客ACM暑期多校第一场

太菜了就过了一道题。A-Equivalent Prefixes 题目描述 Two arrays u and v each with m distinct elements are called equivalent if and only if RMQ(u,l,r)=RMQ(v,l,r)...

2020-09-21

1 478

2019牛客ACM暑期多校第三场

B-Crazy Binary String （前缀和 +记录下标 On）题目描述 ZYB loves binary strings (strings that only contains `0' and `1'). And he loves equal binary strings\te...

2020-09-21

0 687

2019牛客ACM暑期多校第五场

A-digits 2 题目描述 You are given a positive integer n which is at most 100. Please find a positive integer satisfying the following conditions: 1. ...

2020-09-21

0 494

2019牛客ACM暑期多校第七场

A-String 题目描述 A string is perfect if it has the smallest lexicographical ordering among its cyclic rotations. For example: "0101" is pe...

2020-09-21

0 469

2019牛客ACM暑期多校第八场

B-Beauty Values 题目描述 Gromah and LZR have entered the second level. There is a sequence a1,a2,⋯ ,ana_1, a_2, \cdots, a_na1,a2,⋯,an on th...

2020-09-21

0 583

ICPC North Central NA Contest 2018

B. Maximum Subarrays You may have heard of the "maximum subarray problem'' from your university's undergraduate algorithms course. The problem g...

2020-09-21

0 770

Nordic Collegiate Programming Contest 2019

A. Alphabet Animals You are playing a game in which a group of players take turns saying animal names. The animal name you say when it is your turn m...

2020-09-21

0 701

Codeforces Round #641 (Div. 2)

A. Orac and Factors 题意：进行 k 次操作：将原数加上它的最小因子（除1外）思路：如果 n 是偶数，每次加的都是 2 如果 n 是奇数，第一次加上一个奇数，然后变成了一个偶数，之后都加 2 #include<bits/stdc++.h> us...

2020-09-21

0 488

Codeforces Round #643 (Div. 2)

https://codeforc.es/contest/1355 A. Sequence with Digits 当数位中出现0时break #include<bits/stdc++.h> using namespace std; typedef long lon...

2020-09-21

0 467

Codeforces Round #642 (Div. 3)

https://codeforc.es/contest/1353 A. Most Unstable Array 题意：构造一个长为 n 的序列，序列和为 m ，问相邻两数之差绝对值的和的最大值思路见代码 #include <bits/stdc++.h> using n...

2020-09-21

0 515