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Codeforces Round (Div. 2)
5 days
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→ Filter Problems
Difficulty:
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games
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
communication
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
2276F
Permutation Coloring Game
brute force
,
dp
,
dsu
,
games
,
greedy
,
implementation
,
math
x501
2271H2
Personal Issues (Hard Version)
games
,
games
,
trees
,
trees
x66
2271H1
Personal Issues (Easy Version)
dp
,
games
,
games
,
trees
,
trees
x123
2271B
MEX Game
games
x8273
2266B
Three Piles
games
,
greedy
,
math
800
x26464
2263A
Min Max Game
games
800
x18336
2261C
I Know About a Million Things
games
,
math
x7196
2261A
Hey, It's Me, Souvlakity
games
,
math
x8851
2258B1
Carrot Chopdown (Easy Version)
brute force
,
games
,
math
900
x16082
2255A
Hot Potatoes at the Fairy Warehouse
games
,
greedy
,
implementation
1200
x14369
2246D
diss_quack and Array Game
bitmasks
,
brute force
,
games
,
greedy
1900
x3506
2245E
Tom and Jerry
dfs and similar
,
dsu
,
games
,
trees
2300
x1233
2244A
Iskander and Drawings
dp
,
games
,
greedy
,
strings
800
x31190
2241F
A Bit Odd
data structures
,
games
,
greedy
,
math
1700
x5320
2239F
Colorful Works
dp
,
fft
,
games
,
implementation
3500
x260
2239A
Nim Game Is XOR Game
constructive algorithms
,
games
,
greedy
,
math
1300
x9809
2237A
Destroying Towers
games
,
greedy
,
schedules
800
x22635
2236D
Brand New Tatar TV Show
binary search
,
constructive algorithms
,
dp
,
games
,
games
,
math
1300
x13559
2234G
Stripe, Token and Two Players
data structures
,
dp
,
games
2700
x411
2230F
Game on Growing Tree
binary search
,
dfs and similar
,
divide and conquer
,
dp
,
games
,
implementation
,
trees
2700
x547
2228B
Remilia Plays Soku
games
,
implementation
1100
x17827
2218A
The 67th Integer Problem
brute force
,
games
,
implementation
,
math
800
x45881
2217F
Interval Game
bitmasks
,
combinatorics
,
constructive algorithms
,
dp
,
games
,
games
,
greedy
,
greedy
,
math
,
probabilities
2400
x969
2215F
Research
games
3500
x115
2214J
Special Problem
*special problem
,
brute force
,
games
,
interactive
x3744
2208B
Cyclists
brute force
,
games
,
greedy
,
implementation
,
math
,
sortings
1100
x15594
2207D
Boxed Like a Fish
dfs and similar
,
dp
,
games
,
shortest paths
,
trees
2200
x2407
2207B
One Night At Freddy's
games
,
greedy
,
sortings
1600
x6885
2206B
Subtree Removal Game
binary search
,
games
,
trees
2500
x533
2203E
Probabilistic Card Game
binary search
,
data structures
,
games
,
greedy
,
math
,
ternary search
2200
x1586
2203D
Divisibility Game
brute force
,
games
,
games
,
games
,
greedy
,
number theory
,
number theory
1700
x6413
2200E
Divisive Battle
games
,
greedy
,
math
,
number theory
1500
x9824
2196A
Game with a Fraction
games
,
math
1200
x18146
2190B2
Sub-RBS (Hard Version)
dp
,
games
,
implementation
,
strings
1900
x3500
2190A
Sorting Game
constructive algorithms
,
games
,
greedy
1200
x18856
2187C
Jerry and Tom
data structures
,
dfs and similar
,
dsu
,
games
,
graphs
,
greedy
,
trees
2300
x1531
2183A
Binary Array Game
games
800
x24452
2181F
Fragmented Nim
games
1600
x4216
2181B
Battle of Arrays
data structures
,
games
,
greedy
1400
x6829
2180H2
Bug Is Feature (Conditional Version)
games
3500
x126
2180H1
Bug Is Feature (Unconditional Version)
games
3400
x135
2171C2
Renako Amaori and XOR Game (hard version)
bitmasks
,
games
,
greedy
1400
x12824
2171C1
Renako Amaori and XOR Game (easy version)
bitmasks
,
games
,
greedy
1100
x20475
2161A
Round Trip
games
,
greedy
,
implementation
,
math
800
x16263
2158C
Annoying Game
dp
,
games
,
greedy
1400
x12237
2157I
Hyper Smawk Bros
dp
,
dp
,
games
3500
x226
2156E
Best Time to Buy and Sell Stock
binary search
,
brute force
,
data structures
,
dp
,
games
,
graphs
,
greedy
2500
x1028
2155E
Mimo & Yuyu
games
,
greedy
,
math
2200
x3163
2152D
Division Versus Addition
games
,
greedy
,
math
1700
x9119
2152B
Catching the Krug
games
1300
x15101
2147D
Game on Array
games
,
greedy
1700
x9342
2140C
Ultimate Value
data structures
,
games
,
greedy
1500
x13433
2137G
Cry Me a River
dfs and similar
,
dp
,
games
,
graphs
2200
x2084
2127C
Trip Shopping
games
,
greedy
,
sortings
1400
x15245
2127B
Hamiiid, Haaamid... Hamid?
games
,
greedy
1300
x15276
2123D
Binary String Battle
constructive algorithms
,
games
,
greedy
1200
x22932
2116A
Gellyfish and Tricolor Pansy
games
,
greedy
800
x27350
2115D
Gellyfish and Forget-Me-Not
bitmasks
,
dp
,
games
,
greedy
,
math
2900
x3101
2107B
Apples in Boxes
games
,
greedy
,
math
1100
x20469
2104C
Card Game
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1100
x17986
2095B
Plinko
*special problem
,
games
,
interactive
x6092
2089C1
Key of Like (Easy Version)
dp
,
games
,
math
,
probabilities
2200
x1531
2084G1
Wish Upon a Satellite (Easy Version)
dp
,
games
2600
x781
2079A
Alice, Bob, And Two Arrays
*special problem
,
data structures
,
dp
,
games
3300
x49
2070E
Game with Binary String
constructive algorithms
,
data structures
,
divide and conquer
,
games
,
greedy
,
math
2200
x1986
2062E2
The Game (Hard Version)
data structures
,
dfs and similar
,
games
,
graphs
,
implementation
,
trees
3000
x490
2062E1
The Game (Easy Version)
data structures
,
dfs and similar
,
games
,
graphs
,
greedy
,
trees
2000
x4480
2060C
Game of Mathletes
games
,
greedy
,
sortings
,
two pointers
900
x33453
2055A
Two Frogs
constructive algorithms
,
games
,
greedy
,
math
800
x34260
2053E
Resourceful Caterpillar Sequence
dfs and similar
,
dp
,
games
,
graphs
,
greedy
,
trees
1900
x4656
2045F
Grid Game 3-angle
games
,
math
3000
x193
2043F
Nim
bitmasks
,
brute force
,
combinatorics
,
dp
,
games
,
greedy
,
implementation
,
shortest paths
2700
x935
2042B
Game with Colored Marbles
games
,
greedy
900
x20066
2040A
Game of Division
games
,
math
800
x24906
2038A
Bonus Project
games
,
greedy
1400
x5758
2032F
Peanuts
combinatorics
,
dp
,
games
,
math
2700
x510
2030C
A TRUE Battle
brute force
,
games
,
greedy
1100
x20404
2030B
Minimise Oneness
combinatorics
,
constructive algorithms
,
games
,
math
800
x24277
2029B
Replacement
constructive algorithms
,
games
,
strings
1100
x12107
2028E
Alice's Adventures in the Rabbit Hole
combinatorics
,
dfs and similar
,
dp
,
games
,
greedy
,
math
,
probabilities
,
trees
2300
x2047
2027E1
Bit Game (Easy Version)
bitmasks
,
brute force
,
games
,
math
2800
x278
2013F1
Game in Tree (Easy Version)
binary search
,
brute force
,
data structures
,
dp
,
games
,
greedy
,
implementation
,
trees
2700
x693
2006A
Iris and Game on the Tree
constructive algorithms
,
dfs and similar
,
games
,
graphs
,
greedy
,
trees
1700
x10086
2005E2
Subtangle Game (Hard Version)
data structures
,
dp
,
games
,
greedy
,
implementation
2500
x1120
2005E1
Subtangle Game (Easy Version)
dp
,
games
,
greedy
,
implementation
2100
x3425
2004E
Not a Nim Problem
brute force
,
games
,
math
,
number theory
2100
x5309
2004C
Splitting Items
games
,
greedy
,
sortings
1100
x27742
2003B
Turtle and Piggy Are Playing a Game 2
games
,
greedy
,
sortings
800
x27844
2002B
Removals Game
constructive algorithms
,
games
1000
x23645
1994H
Fortnite
combinatorics
,
constructive algorithms
,
games
,
greedy
,
hashing
,
interactive
,
math
,
number theory
,
strings
3500
x784
1991I
Grid Game
constructive algorithms
,
games
,
graph matchings
,
greedy
,
interactive
3500
x173
1991H
Prime Split Game
bitmasks
,
dp
,
fft
,
games
,
math
,
number theory
3300
x591
1991E
Coloring Game
constructive algorithms
,
dfs and similar
,
games
,
graphs
,
greedy
,
interactive
1900
x5320
1990A
Submission Bait
brute force
,
games
,
greedy
,
sortings
900
x27523
1987D
World is Mine
dp
,
games
1800
x9106
1972B
Coin Games
games
900
x26003
1970C3
Game on Tree (Hard)
dfs and similar
,
dp
,
games
,
trees
1900
x2679
1970C2
Game on Tree (Medium)
dfs and similar
,
dp
,
games
,
trees
1700
x4668
1970C1
Game on Tree (Easy)
games
1400
x5327
1968D
Permutation Game
brute force
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
1300
x17860
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