dragonylee的博客

Codeforces Global Round 13 / contest 1491目录Codeforces Global Round 13 / contest 1491A K-th Largest ValueB Minimal CostC Pekora and TrampolineD Zookeeper and The Infinite ZooE Fib-treeFGHIABCDEFGHI√√√√√（ √：做出； ●：尝试未做出； ○：已补题 ）

目录A Omkar and PasswordB Omkar and Infinity ClockC Omkar and WaterslideD Omkar and Bed WarsE Omkar and DuckF Omkar and LandslideG Omkar and PiesH ZS Shuffles CardsI题目地址：https://codeforces.com/contest/1392A Omkar and Password题意：给你一个数组，每次你可以选择相邻的两个不相同的

目录A Multiples of LengthB Stoned GameC Monster InvadersDEABCDE√√√（ √：做出； ●：尝试未做出； ○：已补题 ）题目地址：https://codeforces.com/contest/1396A Multiples of Length题意：给定一个长度为 n 的数组 a，你可以操作恰好 3 次，每次操作如下：选择 a 的一个子数组（假设长度为 len），然后对这个子数组的每一个数，可以

目录A String SimilarityB RPG ProtagonistC Binary String ReconstructionD ZigzagsE Clear the MultisetF x-prime SubstringsG Mercenaries题目地址：https://codeforces.com/contest/1400A String Similarity题意：水题思路：代码：#define DIN freopen("input.txt","r",stdin);#d

目录A Distance and AxisB Ternary SequenceC Mere ArrayD Maximum Distributed TreeE Divide SquareF Reverse and SwapABCDEF√√√√√○（ √：做出； ●：尝试未做出； ○：已补题 ）题目地址：https://codeforces.com/contest/1401这次的题目不算难吧，F题思路已经有了，赛后一小会儿就写出来了。A Distanc

目录A Rainbow Dash, Fluttershy and Chess ColoringB Applejack and StoragesC Pinkie Pie Eats Patty-cakesD Rarity and New DressE1E2ABCDE1E2√√√√（ √：做出； ●：尝试未做出； ○：已补题 ）题目地址：https://codeforces.com/contest/1393A Rainbow Dash, Fluttersh

目录A Captain Flint and Crew RecruitmentB Captain Flint and a Long VoyageC Uncle Bogdan and Country HappinessD Captain Flint and TreasureEABCDE√√√√（ √：做出； ●：尝试未做出； ○：已补题 ）题目地址：https://codeforces.com/contest/1388这一次的题目好难读懂题……然后题目难度不大，

目录A1 Prefix Flip (Easy Version)A2 Prefix Flip (Hard Version)B UnmergeC MastermindDEA1A2BCDE√○√○（ √：做出； ●：尝试未做出； ○：已补题 ）题目地址：https://codeforces.com/contest/1381第一次打 div1，然后一下子rating就掉了七十多，其实A2的思路还是很简单的，可是当时想复杂了，然后C题很可惜没有做出来。感觉最近几次

目录A Omkar and CompletionB Omkar and Last Class of MathC Omkar and BaseballD Omkar and CircleEF题目地址：https://codeforces.com/contest/1372A Omkar and Completion题意：签到题思路：代码：#define DIN freopen("input.txt","r",stdin);#define DOUT freopen("output.txt","

目录A Magical SticksB Magical CalendarC A Cookie for YouD Grid-00100E Asterism (Easy/Hard Version)FABCDEF√√√√√（ √：做出； ●：尝试未做出； ○：已补题 ）题目地址：https://codeforces.com/contest/1371A Magical Sticks题意：思路：代码：#include <bits/stdc++.h

目录A Road To ZeroB Binary PeriodC Yet Another Counting ProblemD Multiple TestcasesE Placing RooksF Make It Ascending题目地址：https://codeforces.com/contest/1342A Road To Zero题意：思路：代码：#include <bits/stdc++.h>#define mem(a,b) memset(a,b,sizeof(a))

目录A Donut ShopsB 01 GameC Pluses and MinusesD Maximum Sum on Even PositionsE Sum of DigitsF Network CoverageGABCDEFG√√√√√（ √：做出； ●：尝试未做出； ○：已补题 ）题目地址：https://codeforces.com/contest/1373A Donut Shops题意：思路：代码：#include <b

目录A Nastya and Strange GeneratorB Nastya and ScoreboardC Nastya and Unexpected GuestD Nastya and Time MachineF题目地址：https://codeforces.com/contest/1340A Nastya and Strange Generator题意：思路：代码：#include <bits/stdc++.h>#define mem(a,b) memset(a,

目录A Maximum GCDB GCD CompressionC Number GameD Odd-Even SubsequenceE Binary Subsequence RotationF The Hidden PairABCDEF√√√√√（ √：做出； ●：尝试未做出； ○：已补题 ）题目地址：https://codeforces.com/contest/1370A Maximum GCD题意：思路：代码：#include <

目录A XXXXXB Most socially-distanced subsequenceC Ehab and Prefix MEXsD Ehab's Last CorollaryE X-ORABCDE√√√○○（ √：做出； ●：尝试未做出； ○：已补题 ）题目地址：https://codeforces.com/contest/1364这一次做得好差…… ????(ಠ_ಠ)A XXXXX题意：给出一个数组 a，一个整数 x，求最长的 a 的子数组

目录A Linova and KingdomB Xenia and Colorful GemsC Kaavi and Magic SpellDEF题目地址：https://codeforces.com/contest/1336A Linova and Kingdom题意：一棵树根结点为 1，要选出 k 个结点，使得这 k 个结点到根结点的路径中非选中结点的总数最大。思路：考虑贪心的思路，如果只选 1 个，那么肯定选择深度最深的最优，如果选很多个，那么某个结点肯定没有它的儿子更优，所以如果我们选

目录A Powered AdditionB Edge Weight AssignmentC Perfect TriplesD Nested Rubber BandsE题目地址：https://codeforces.com/contest/1338A Powered Addition题意：思路：代码：#pragma GCC optimize(2)#include <bits/stdc++.h>#define mem(a,b) memset(a,b,sizeof(a))#de

目录A Matrix GameB Trouble SortC Rotation MatchingD Solve The MazeE Maximum Subsequence ValueF Swaps AgainGABCDEFG√√√√√√（ √：做出； ●：尝试未做出； ○：已补题 ）题目地址：https://codeforces.com/contest/1365感觉我最近做题错误率好高啊，这一次A、B、D都是WA过的，B最离谱WA了3次。A M

目录A Odd SelectionB Subsequence HateC Game On LeavesD Guess The MaximumsE Tree ShufflingFABCDEF√√√○√（ √：做出； ●：尝试未做出； ○：已补题 ）题目地址：https://codeforces.com/contest/1363这一次比赛真是“命途多舛”，A题WA了两发，到半个多小时才写出来，E题WA了四发，C也因为智障错误WA了一次，特别是E卡了好久，结果

目录A Level StatisticsB Middle ClassC Circle of MonstersD Minimum Euler CycleE Divisor PathsF Strange FunctionG题目地址：https://codeforces.com/contest/1334A Level Statistics题意：思路：代码：#pragma GCC optimize(2)#include <bits/stdc++.h>#define mem(a,b

目录A Park LightingB Maria Breaks the Self-isolationC Celex UpdateD The Best VacationE Are You Fired?FABCDEF√√√√●○●（ √：做出； ●：尝试未做出； ○：已补题 ）题目地址：https://codeforces.com/contest/1358这次是疫情主题。A Park Lighting题意：思路：代码：#pragma GCC

目录A Little ArtemB Kind AntonC Eugene and an arrayD Challenges in school №41E Road to 1600F Kate and imperfection题目地址：https://codeforces.com/contest/1333A Little Artem题意：给出一个n*m的网格（2≤n,m≤100），要把每个格子涂成黑色或者白色。记存在边相邻白格子的黑格子个数为B，存在边相邻黑格子的白格子个数为W，要求给出涂色方案，

目录A Dreamoon Likes ColoringB Dreamoon Likes SequencesC Drazil Likes HeapDE题目地址：https://codeforces.com/contest/1329A Dreamoon Likes Coloring题意：有 n 个格子，m 个操作，每一次操作可以在 [1,n−li+1][1,n-l_i+1][1,n−li​+1] 中选择一个 pip_ipi​，然后把 [pi,pi+li−1][p_i,p_i+l_i-1][pi​,p

目录A Sequence with DigitsB Young ExplorersC Count TrianglesD Game With ArrayE Restorer DistanceFABCDEF√√√√√●（ √：做出； ●：尝试未做出； ○：已补题 ）题目地址：https://codeforces.com/contest/1355A Sequence with Digits题意：an+1=an+minD(an)∗maxD(an)a_{n+

目录A HeatingB Obtain Two ZerosC Infinite FenceD A Game with TrapsE TournamentF Colored Tree题目地址：https://codeforces.com/contest/1260A Heating题意：思路：代码：int main(){ //freopen("input.txt","r",stdin); int n=read(); REP(i,1,n) { i

目录A Math ProblemB BoxC MessyD Optimal SubsequencesE Arson In Berland ForestF Wrong Answer on test 233题目地址：https://codeforces.com/contest/1262A Math Problem题意：思路：代码：int main(){ //freopen(...

目录A Changing VolumeB Fridge LockersC League of LeesinsD Feeding ChickenE Send Boxes to Alice (Hard Version)F Point Ordering题目地址：https://codeforces.com/contest/1255A Changing Volume题意：思路：简单贪心策略即...

目录B Silly MistakeC Sweets EatingD Harmonious GraphE Antenna CoverageF Cheap Robot题目地址：https://codeforces.com/contest/1253#### A Single Push题意：有两个一样长的数组a、b，问是否可以给a的某一段连续区间加上一个正整数（或者不进行操作），使得a与b相等...