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Before contest
Codeforces Round 941 (Div. 1)
4 days
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*has extra registration
Before contest
Codeforces Round 941 (Div. 2)
4 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
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
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x43878
1899A
Game with Integers
games
,
math
,
number theory
800
x37134
1858A
Buttons
games
,
greedy
,
math
800
x33890
1373B
01 Game
games
900
x32615
1919A
Wallet Exchange
games
,
math
800
x31544
276B
Little Girl and Game
games
,
greedy
1300
x27112
1472D
Even-Odd Game
dp
,
games
,
greedy
,
sortings
1200
x25971
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x25390
1719A
Chip Game
games
,
math
800
x24959
1841A
Game with Board
constructive algorithms
,
games
800
x24159
1527B1
Palindrome Game (easy version)
constructive algorithms
,
games
1200
x24083
1398B
Substring Removal Game
games
,
greedy
,
sortings
800
x24033
1382B
Sequential Nim
dp
,
games
1100
x23845
1844A
Subtraction Game
constructive algorithms
,
games
800
x23781
1365A
Matrix Game
games
,
greedy
,
implementation
1100
x23527
1370C
Number Game
games
,
math
,
number theory
1400
x23469
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x23443
1681A
Game with Cards
games
,
greedy
800
x20701
832A
Sasha and Sticks
games
,
math
800
x20313
1747C
Swap Game
games
1200
x20226
1842A
Tenzing and Tsondu
games
,
math
800
x19403
1419A
Digit Game
games
,
greedy
,
implementation
900
x19238
1455C
Ping-pong
constructive algorithms
,
games
,
math
1100
x19204
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x19089
1673A
Subtle Substring Subtraction
games
,
greedy
,
strings
800
x18205
1695B
Circle Game
games
,
greedy
1000
x17975
1363C
Game On Leaves
games
,
trees
1600
x17776
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x17178
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x17027
1956B
Nene and the Card Game
games
,
greedy
800
x17014
1270A
Card Game
games
,
greedy
,
math
800
x16605
1916C
Training Before the Olympiad
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1200
x16542
1627B
Not Sitting
games
,
greedy
,
sortings
1300
x16235
1848A
Vika and Her Friends
games
,
math
900
x16153
1695A
Subrectangle Guess
games
800
x16094
1672A
Log Chopping
games
,
implementation
,
math
800
x15825
570B
Simple Game
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1300
x15726
1874A
Jellyfish and Game
brute force
,
games
,
greedy
,
implementation
1200
x15684
1943A
MEX Game 1
games
,
greedy
1300
x14729
1749C
Number Game
binary search
,
data structures
,
games
,
greedy
,
implementation
1400
x13244
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x13068
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x13036
1102C
Doors Breaking and Repairing
games
1200
x12736
1834C
Game with Reversing
games
,
greedy
,
math
,
strings
1200
x12561
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x12334
841B
Godsend
games
,
math
1100
x11939
1537D
Deleting Divisors
games
,
math
,
number theory
1700
x11814
1155B
Game with Telephone Numbers
games
,
greedy
,
implementation
1200
x11695
616B
Dinner with Emma
games
,
greedy
1000
x11253
1914E2
Game with Marbles (Hard Version)
games
,
greedy
,
sortings
1400
x11103
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x11028
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10903
1396B
Stoned Game
brute force
,
constructive algorithms
,
games
,
greedy
1800
x10841
1740C
Bricks and Bags
constructive algorithms
,
games
,
greedy
,
sortings
1400
x10520
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x10488
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x10482
1220C
Substring Game in the Lesson
games
,
greedy
,
strings
1300
x9887
493D
Vasya and Chess
constructive algorithms
,
games
,
math
1700
x9478
1451D
Circle Game
games
,
geometry
,
math
1700
x9233
705B
Spider Man
games
,
math
1100
x9026
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x8789
1739C
Card Game
combinatorics
,
constructive algorithms
,
dp
,
games
1500
x8674
914B
Conan and Agasa play a Card Game
games
,
greedy
,
implementation
1200
x8491
346A
Alice and Bob
games
,
math
,
number theory
1600
x8439
630R
Game
games
,
math
1200
x8282
150A
Win or Freeze
games
,
math
,
number theory
1400
x7558
1527B2
Palindrome Game (hard version)
constructive algorithms
,
games
1900
x7514
1404B
Tree Tag
dfs and similar
,
dp
,
games
,
trees
1900
x7065
257B
Playing Cubes
games
,
greedy
,
implementation
1300
x6849
3C
Tic-tac-toe
brute force
,
games
,
implementation
1800
x6847
1503B
3-Coloring
constructive algorithms
,
games
,
interactive
1700
x6829
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x6818
148D
Bag of mice
dp
,
games
,
math
,
probabilities
1800
x6728
934A
A Compatible Pair
brute force
,
games
1400
x6697
1873H
Mad City
dfs and similar
,
dsu
,
games
,
graphs
,
shortest paths
,
trees
1700
x6495
1772E
Permutation Game
games
1700
x6351
1425A
Arena of Greed
games
,
greedy
1400
x6327
1194D
1-2-K Game
games
,
math
1700
x6182
1190B
Tokitsukaze, CSL and Stone Game
games
1800
x6173
197A
Plate Game
constructive algorithms
,
games
,
math
1600
x6024
1215D
Ticket Game
games
,
greedy
,
math
1700
x5960
1495B
Let's Go Hiking
games
,
greedy
1900
x5831
455B
A Lot of Games
dfs and similar
,
dp
,
games
,
implementation
,
strings
,
trees
1900
x5637
1737C
Ela and Crickets
constructive algorithms
,
games
,
implementation
,
math
1500
x5543
1033C
Permutation Game
brute force
,
dp
,
games
1600
x5363
1372D
Omkar and Circle
brute force
,
dp
,
games
,
greedy
2100
x5284
1955F
Unfair Game
dp
,
games
,
greedy
,
math
,
schedules
1800
x5278
859C
Pie Rules
dp
,
games
1500
x5233
1383B
GameGame
bitmasks
,
constructive algorithms
,
dp
,
games
,
greedy
,
math
1900
x4747
980C
Posterized
games
,
greedy
1700
x3720
1665D
GCD Guess
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
games
,
interactive
,
math
,
number theory
2000
x3672
1770D
Koxia and Game
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
flows
,
games
,
graph matchings
,
graphs
,
implementation
2000
x3649
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3630
917B
MADMAX
dfs and similar
,
dp
,
games
,
graphs
1700
x3477
388C
Fox and Card Game
games
,
greedy
,
sortings
2000
x3074
936B
Sleepy Game
dfs and similar
,
dp
,
games
,
graphs
2100
x3027
794C
Naming Company
games
,
greedy
,
sortings
1800
x3018
1628D1
Game on Sum (Easy Version)
combinatorics
,
dp
,
games
,
math
2100
x3005
1147C
Thanos Nim
games
2000
x2999
1605D
Treelabeling
bitmasks
,
constructive algorithms
,
dfs and similar
,
games
,
greedy
,
implementation
,
trees
2100
x2830
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