atcoder-solutionsatcoder-solutions
ABCARCAGCAHCOTHER

arc217

A

Min of Sum of XOR

B

Not High Element

C

Greedy Customers 2

D

Greedy Customer

E

Tree Growing

arc216

A

Reversi 3

B

Range Mex Sum

C

Count Power of 2

D

GCD of Product of Arithmetic Progression

E

Swap or Reverse

arc215

A

Zombie

B

Stolen Necklace

C

Strong Surname

D

cresc.

E

CNOT Party

F

Scapus

arc214

A

Same Sum Grid Path

B

Missing Number in Graph

C

Divide into 4 Teams

D

Distinct Sum Grid Path

E

Swap K times

F

Unpredictable Moves

arc213

A

Swapping Game

B

Hamming Distance is not 1

C

Double X

D

Minimize Inversion

arc212

A

Four TSP

B

Stones on Grid

C

ABS Ball

D

Two Rooms

E

Drop Min

F

Add Integer

arc211

A

Banned X 2

B

Three Sequences

C

Forest

D

Michishirube

E

Greedy Takahashi 2

arc210

A

Always Increasing

B

Remove Median Operations

C

Fair Coin Partition

D

Independent Set Game

E

Subset Sum Gaps

F

± ab

arc209

A

Bracket Game

B

Minimize Even Palindrome

C

Adjusting a Rectangle

D

A_A_i

E

I hate ABC

arc208

A

Bitwise OR Game

B

Sum of Mod

C

Mod of XOR

D

Symmetric Matrix

E

XY Game

arc207

A

Affinity for Artifacts

B

Balanced Neighbors 2

C

Combine to Make Non-decreasing

D

Devourers and Cake

E

Erase and Append

arc206

A

Range Replace

B

Slime Swap

C

Tree Sequence

D

LIS ∩ LDS

E

Rectangle Coloring

arc205

A

2x2 Erasing

B

Triangle Toggle

C

No Collision Moves

D

Non-Ancestor Matching

E

Subset Product Problem

arc204

A

Use Udon Coupon

B

Sort Permutation

C

Maximize Sum of Mex

D

Favorite Interval

arc203

A

All Winners

B

Swap If Equal Sum

C

Destruction of Walls

D

Insert XOR

E

Tile Grid with One Hole

arc202

A

Merge and Increment

B

Japanese "Knight's Tour"

C

Repunits

D

King

arc201

A

CatCoder Double Contest

B

Binary Knapsack

C

Prefix Covering

D

Match, Mod, Minimize

E

Total Area of Bounding Boxes

F

CatCoder Triple Contest

arc200

A

Dot Product

B

LCM

C

Movie Theater

D

|A + A|

E

popcount <= 2

arc199

A

Flip Row or Col 2

B

Adjacent Replace

C

Circular Tree Embedding

D

Limestone

arc198

A

I hate 1

B

Rivalry

C

Error Swap

D

Many Palindromes on Tree

E

Monotone OR

arc197

A

Union of Grid Paths

B

Greater Than Average

C

Removal of Multiples

D

Ancestor Relation

E

Four Square Tiles

arc196

A

Adjacent Delete

B

Torus Loop

C

Strongly Connected

D

Roadway

arc195

A

Twice Subsequence

B

Uniform Sum

C

Hamiltonian Pieces

D

Swap and Erase

E

Random Tree Distance

arc194

A

Operations on a Stack

B

Minimum Cost Sort

C

Cost to Flip

D

Reverse Brackets

E

Swap 0^X and 1^Y

arc193

A

Complement Interval Graph

B

Broken Wheel

C

Grid Coloring 3

D

Magnets

arc192

A

ARC Arc

B

Fennec VS. Snuke 2

C

Range Sums 2

D

Fraction Line

E

Snuke's Kyoto Trip

arc191

A

Replace Digits

B

XOR = MOD

C

A^n - 1

D

Moving Pieces on Graph

E

Unfair Game

arc190

A

Inside or Outside

B

L Partition

C

Basic Grid Problem with Updates

D

Matrix Pow Sum

E

Gaps of 1 or 2

arc189

A

Reversi 2

B

Minimize Sum

C

Balls and Boxes

D

Takahashi is Slime

E

Straight Path

arc188

A

ABC Symmetry

B

Symmetric Painting

C

Honest or Liar or Confused

D

Mirror and Order

E

Gravity Sort

arc187

A

Add and Swap

B

Sum of CC

C

1 Loop Bubble Sort

D

Many Easy Optimizations

E

Replace Triplets

arc186

A

Underclued

B

Typical Permutation Descriptor

C

Ball and Box

D

Polish Mania

E

Missing Subsequence

arc185

A

mod M Game 2

B

+1 and -1

C

Sum of Three Integers

D

Random Walk on Tree

E

Adjacent GCD

arc184

A

Appraiser

B

123 Set

C

Mountain and Valley Folds

D

Erase Balls 2D

E

Accumulating Many Times

arc183

A

Median of Good Sequences

B

Near Assignment

C

Not Argmax

D

Keep Perfectly Matched

E

Ascendant Descendant

F

Sum of Minimum Distance

arc182

A

Chmax Rush!

B

|{floor(A_i/2^k)}|

C

Sum of Number of Divisors of Product

D

Increment Decrement Again

E

Sum of Min of Mod of Linear

F

Graph of Mod of Linear

arc181

A

Sort Left and Right

B

Annoying String Problem

C

Row and Column Order

D

Prefix Bubble Sort

E

Min and Max at the edge

F

Colorful Reversi

arc180

A

ABA and BAB

B

Improve Inversions

C

Subsequence and Prefix Sum

D

Division into 3

E

LIS and Inversion

F

Yet Another Expected Value

arc179

A

Partition

B

Between B and B

C

Beware of Overflow

D

Portable Gate

E

Rectangle Concatenation

F

All the Same

arc178

A

Good Permutation 2

B

1 + 6 = 7

C

Sum of Abs 2

D

Delete Range Mex

E

Serval Survival

F

Long Sequence Inversion

arc177

A

Exchange

B

Puzzle of Lamps

C

Routing

D

Earthquakes

E

Wrong Scoreboard

F

Two Airlines

arc176

A

01 Matrix Again

B

Simple Math 4

C

Max Permutation

D

Swap Permutation

E

Max Vector

F

Colorful Star

arc175

A

Spoon Taking Problem

B

Parenthesis Arrangement

C

Jumping Through Intervals

D

LIS on Tree 2

E

Three View Drawing

F

Append Same Characters

arc174

A

A Multiply

B

Bought Review

C

Catastrophic Roulette

D

Digit vs Square Root

E

Existence Counting

F

Final Stage

arc173

A

Neq Number

B

Make Many Triangles

C

Not Median

D

Bracket Walk

E

Rearrange and Adjacent XOR

F

Select and Split

arc172

A

Chocolate

B

AtCoder Language

C

Election

D

Distance Ranking

E

Last 9 Digits

F

Walking

arc171

A

No Attacking

B

Chmax

C

Swap on Tree

D

Rolling Hash

E

Rookhopper's Tour

F

Both Reversible

arc170

A

Yet Another AB Problem

B

Arithmetic Progression Subsequence

C

Prefix Mex Sequence

D

Triangle Card Game

E

BDFS

F

Edge Deletion 2

arc169

A

Please Sign

B

Subsegments with Small Sums

C

Not So Consecutive

D

Add to Make a Permutation

E

Avoid Boring Matches

F

Large DP Table

arc168

A

<Inversion>

B

Arbitrary Nim

C

Swap Characters

D

Maximize Update

E

Subsegments with Large Sums

F

Up-Down Queries