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Codeforces Round (Div. 4)
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games
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
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
1628D1
Game on Sum (Easy Version)
combinatorics
,
dp
,
games
,
math
2100
x3268
1627B
Not Sitting
games
,
greedy
,
sortings
1300
x16859
1617E
Christmas Chocolates
dfs and similar
,
dp
,
games
,
graphs
,
implementation
,
math
,
number theory
,
shortest paths
,
trees
2700
x893
1615E
Purple Crayon
data structures
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1530
1610I
Mashtali vs AtCoder
games
,
trees
3100
x289
1605D
Treelabeling
bitmasks
,
constructive algorithms
,
dfs and similar
,
games
,
greedy
,
implementation
,
trees
2100
x2995
1600E
Array Game
games
,
greedy
,
two pointers
1900
x2174
1585G
Poachers
dp
,
games
,
graphs
,
trees
2500
x231
1584E
Game with Stones
binary search
,
data structures
,
games
,
greedy
2300
x1320
1537D
Deleting Divisors
games
,
math
,
number theory
1700
x12689
1536F
Omkar and Akmar
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
fft
,
games
,
geometry
,
math
,
meet-in-the-middle
,
string suffix structures
2600
x981
1527B2
Palindrome Game (hard version)
constructive algorithms
,
games
1900
x8101
1527B1
Palindrome Game (easy version)
constructive algorithms
,
games
1200
x27291
1511G
Chips on a Board
bitmasks
,
brute force
,
data structures
,
dp
,
games
,
two pointers
2700
x837
1503B
3-Coloring
constructive algorithms
,
games
,
interactive
1700
x7126
1498F
Christmas Game
bitmasks
,
data structures
,
dfs and similar
,
dp
,
games
,
math
,
trees
2500
x965
1495B
Let's Go Hiking
games
,
greedy
1900
x6098
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x26166
1472D
Even-Odd Game
dp
,
games
,
greedy
,
sortings
1200
x28126
1458E
Nim Shortcuts
data structures
,
games
3100
x508
1455C
Ping-pong
constructive algorithms
,
games
,
math
1100
x19778
1451F
Nullify The Matrix
constructive algorithms
,
games
2700
x1010
1451D
Circle Game
games
,
geometry
,
math
1700
x9671
1442F
Differentiating Games
games
,
interactive
3400
x144
1439E
Cheat and Win
bitmasks
,
data structures
,
games
,
trees
3500
x228
1434E
A Convex Game
dsu
,
games
3500
x200
1431G
Number Deletion Game
*special problem
,
dp
,
games
,
greedy
2100
x192
1427H
Prison Break
binary search
,
games
,
geometry
,
ternary search
3500
x81
1425A
Arena of Greed
games
,
greedy
1400
x6681
1419A
Digit Game
games
,
greedy
,
implementation
900
x19738
1411G
No Game No Life
bitmasks
,
games
,
math
,
matrices
2700
x684
1404B
Tree Tag
dfs and similar
,
dp
,
games
,
trees
1900
x7573
1402C
Star Trek
*special problem
,
combinatorics
,
dfs and similar
,
dp
,
games
,
graphs
,
matrices
,
trees
2600
x208
1398B
Substring Removal Game
games
,
greedy
,
sortings
800
x24863
1396B
Stoned Game
brute force
,
constructive algorithms
,
games
,
greedy
1800
x11634
1383B
GameGame
bitmasks
,
constructive algorithms
,
dp
,
games
,
greedy
,
math
1900
x5157
1382B
Sequential Nim
dp
,
games
1100
x24932
1375F
Integer Game
constructive algorithms
,
games
,
interactive
,
math
2600
x2299
1373B
01 Game
games
900
x38245
1372D
Omkar and Circle
brute force
,
dp
,
games
,
greedy
2100
x5465
1370C
Number Game
games
,
math
,
number theory
1400
x25139
1369F
BareLee
dfs and similar
,
dp
,
games
2700
x667
1368F
Lamps on a Circle
games
,
implementation
,
interactive
,
math
2600
x1063
1365A
Matrix Game
games
,
greedy
,
implementation
1100
x24324
1363C
Game On Leaves
games
,
trees
1600
x19248
1346H
Game with Segments
*special problem
,
data structures
,
games
2700
x52
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3974
1312F
Attack on Red Kingdom
games
,
two pointers
2500
x928
1270A
Card Game
games
,
greedy
,
math
800
x17154
1221E
Game With String
games
2500
x1104
1220C
Substring Game in the Lesson
games
,
greedy
,
strings
1300
x10380
1215D
Ticket Game
games
,
greedy
,
math
1700
x6241
1197F
Coloring Game
dp
,
games
,
matrices
2700
x272
1194D
1-2-K Game
games
,
math
1700
x6657
1190C
Tokitsukaze and Duel
brute force
,
games
,
greedy
2300
x2049
1190B
Tokitsukaze, CSL and Stone Game
games
1800
x6514
1155B
Game with Telephone Numbers
games
,
greedy
,
implementation
1200
x11999
1149E
Election Promises
games
,
graphs
3200
x549
1147F
Zigzag Game
games
,
interactive
3500
x268
1147C
Thanos Nim
games
2000
x3338
1110G
Tree-Tac-Toe
constructive algorithms
,
games
,
trees
3100
x637
1102C
Doors Breaking and Repairing
games
1200
x13265
1100D
Dasha and Chess
constructive algorithms
,
games
,
interactive
2500
x881
1099F
Cookies
binary search
,
data structures
,
dfs and similar
,
dp
,
games
,
trees
2400
x969
1091H
New Year and the Tricolore Recreation
games
3200
x438
1090G
Combostone
games
,
implementation
2500
x111
1076G
Array Game
data structures
,
games
3000
x631
1037G
A Game on Strings
games
3200
x316
1033G
Chip Game
games
3500
x397
1033C
Permutation Game
brute force
,
dp
,
games
1600
x5676
980C
Posterized
games
,
greedy
1700
x3810
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x49215
936B
Sleepy Game
dfs and similar
,
dp
,
games
,
graphs
2100
x3285
934A
A Compatible Pair
brute force
,
games
1400
x7082
930D
Game with Tokens
data structures
,
games
,
implementation
2500
x420
919F
A Game With Numbers
games
,
graphs
,
shortest paths
2600
x346
917B
MADMAX
dfs and similar
,
dp
,
games
,
graphs
1700
x3587
914H
Ember and Storm's Tree Game
combinatorics
,
dp
,
games
,
trees
3400
x244
914B
Conan and Agasa play a Card Game
games
,
greedy
,
implementation
1200
x8695
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2162
859C
Pie Rules
dp
,
games
1500
x5511
850C
Arpa and a game with Mojtaba
bitmasks
,
dp
,
games
2200
x1544
841B
Godsend
games
,
math
1100
x12430
838C
Future Failure
dp
,
games
2800
x358
832A
Sasha and Sticks
games
,
math
800
x21112
819A
Mister B and Boring Game
games
,
greedy
2200
x500
812E
Sagheer and Apple Tree
games
,
trees
2300
x1116
794E
Choosing Carrot
games
,
math
2800
x820
794C
Naming Company
games
,
greedy
,
sortings
1800
x3170
786A
Berzerk
dfs and similar
,
dp
,
games
2000
x2584
768E
Game of Stones
bitmasks
,
dp
,
games
2100
x3051
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x11494
731E
Funny Game
dp
,
games
2200
x1747
725F
Family Photos
games
,
greedy
2900
x545
717D
Dexterina’s Lab
games
,
matrices
,
probabilities
1900
x1458
705B
Spider Man
games
,
math
1100
x9227
630R
Game
games
,
math
1200
x8862
616B
Dinner with Emma
games
,
greedy
1000
x12159
603C
Lieges of Legendre
games
,
math
2200
x1925
594A
Warrior and Archer
games
2300
x1750
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