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Codeforces Round 945 (Div. 2)
3 days
Register now »
*has extra registration
→ Filter Problems
Difficulty:
—
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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Custom test
Problems
#
Name
896B
Ithea Plays With Chtholly
binary search
,
constructive algorithms
,
games
,
greedy
,
interactive
2000
x2049
15C
Industrial Nim
games
2000
x2164
786A
Berzerk
dfs and similar
,
dp
,
games
2000
x2307
388C
Fox and Card Game
games
,
greedy
,
sortings
2000
x3088
1147C
Thanos Nim
games
2000
x3155
1770D
Koxia and Game
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
flows
,
games
,
graph matchings
,
graphs
,
implementation
2000
x3676
1665D
GCD Guess
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
games
,
interactive
,
math
,
number theory
2000
x3703
1970C3
Game on Tree (Hard)
dfs and similar
,
dp
,
games
,
trees
1900
x672
69D
Dot
dp
,
games
1900
x933
135C
Zero-One
constructive algorithms
,
games
,
greedy
1900
x1322
717D
Dexterina’s Lab
games
,
matrices
,
probabilities
1900
x1372
279E
Beautiful Decomposition
dp
,
games
,
greedy
,
number theory
1900
x1410
55C
Pie or die
games
1900
x1580
1600E
Array Game
games
,
greedy
,
two pointers
1900
x1928
1383B
GameGame
bitmasks
,
constructive algorithms
,
dp
,
games
,
greedy
,
math
1900
x4767
455B
A Lot of Games
dfs and similar
,
dp
,
games
,
implementation
,
strings
,
trees
1900
x5677
1495B
Let's Go Hiking
games
,
greedy
1900
x5845
1404B
Tree Tag
dfs and similar
,
dp
,
games
,
trees
1900
x7087
1527B2
Palindrome Game (hard version)
constructive algorithms
,
games
1900
x7558
794C
Naming Company
games
,
greedy
,
sortings
1800
x3037
1955F
Unfair Game
dp
,
games
,
greedy
,
math
,
schedules
1800
x5896
1190B
Tokitsukaze, CSL and Stone Game
games
1800
x6295
148D
Bag of mice
dp
,
games
,
math
,
probabilities
1800
x6793
3C
Tic-tac-toe
brute force
,
games
,
implementation
1800
x6878
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x6884
1396B
Stoned Game
brute force
,
constructive algorithms
,
games
,
greedy
1800
x10886
1970C2
Game on Tree (Medium)
dfs and similar
,
dp
,
games
,
trees
1700
x1032
533C
Board Game
games
,
greedy
,
implementation
,
math
1700
x2146
917B
MADMAX
dfs and similar
,
dp
,
games
,
graphs
1700
x3488
980C
Posterized
games
,
greedy
1700
x3724
1215D
Ticket Game
games
,
greedy
,
math
1700
x5973
1194D
1-2-K Game
games
,
math
1700
x6336
1772E
Permutation Game
games
1700
x6405
1873H
Mad City
dfs and similar
,
dsu
,
games
,
graphs
,
shortest paths
,
trees
1700
x6611
1503B
3-Coloring
constructive algorithms
,
games
,
interactive
1700
x6845
1451D
Circle Game
games
,
geometry
,
math
1700
x9266
493D
Vasya and Chess
constructive algorithms
,
games
,
math
1700
x9524
1537D
Deleting Divisors
games
,
math
,
number theory
1700
x11874
1033C
Permutation Game
brute force
,
dp
,
games
1600
x5382
197A
Plate Game
constructive algorithms
,
games
,
math
1600
x6037
346A
Alice and Bob
games
,
math
,
number theory
1600
x8463
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x8930
1363C
Game On Leaves
games
,
trees
1600
x17853
74B
Train
dp
,
games
,
greedy
1500
x1492
293A
Weird Game
games
,
greedy
1500
x2800
859C
Pie Rules
dp
,
games
1500
x5270
1737C
Ela and Crickets
constructive algorithms
,
games
,
implementation
,
math
1500
x5566
1739C
Card Game
combinatorics
,
constructive algorithms
,
dp
,
games
1500
x8716
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x10569
1970C1
Game on Tree (Easy)
games
1400
x1333
120E
Put Knight!
games
,
math
1400
x2648
1425A
Arena of Greed
games
,
greedy
1400
x6359
934A
A Compatible Pair
brute force
,
games
1400
x6704
150A
Win or Freeze
games
,
math
,
number theory
1400
x7586
1965A
Everything Nim
games
,
greedy
,
math
,
sortings
1400
x9995
1740C
Bricks and Bags
constructive algorithms
,
games
,
greedy
,
sortings
1400
x10588
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x11165
1914E2
Game with Marbles (Hard Version)
games
,
greedy
,
sortings
1400
x11266
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x12448
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x13274
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x13386
1749C
Number Game
binary search
,
data structures
,
games
,
greedy
,
implementation
1400
x13394
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x17079
1370C
Number Game
games
,
math
,
number theory
1400
x23562
257B
Playing Cubes
games
,
greedy
,
implementation
1300
x6869
1220C
Substring Game in the Lesson
games
,
greedy
,
strings
1300
x9900
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x10568
1968D
Permutation Game
brute force
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
1300
x11124
1943A
MEX Game 1
games
,
greedy
1300
x15363
570B
Simple Game
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1300
x15780
1627B
Not Sitting
games
,
greedy
,
sortings
1300
x16288
276B
Little Girl and Game
games
,
greedy
1300
x27281
630R
Game
games
,
math
1200
x8313
914B
Conan and Agasa play a Card Game
games
,
greedy
,
implementation
1200
x8505
1155B
Game with Telephone Numbers
games
,
greedy
,
implementation
1200
x11727
1834C
Game with Reversing
games
,
greedy
,
math
,
strings
1200
x12653
1102C
Doors Breaking and Repairing
games
1200
x12792
1874A
Jellyfish and Game
brute force
,
games
,
greedy
,
implementation
1200
x15809
1916C
Training Before the Olympiad
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1200
x16698
1747C
Swap Game
games
1200
x20362
1527B1
Palindrome Game (easy version)
constructive algorithms
,
games
1200
x24291
1472D
Even-Odd Game
dp
,
games
,
greedy
,
sortings
1200
x26100
705B
Spider Man
games
,
math
1100
x9045
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10930
841B
Godsend
games
,
math
1100
x11972
1455C
Ping-pong
constructive algorithms
,
games
,
math
1100
x19238
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x19299
1365A
Matrix Game
games
,
greedy
,
implementation
1100
x23579
1382B
Sequential Nim
dp
,
games
1100
x23910
616B
Dinner with Emma
games
,
greedy
1000
x11282
1695B
Circle Game
games
,
greedy
1000
x18032
1972B
Coin Games
games
900
x14889
1848A
Vika and Her Friends
games
,
math
900
x16239
1419A
Digit Game
games
,
greedy
,
implementation
900
x19267
1373B
01 Game
games
900
x32908
1966A
Card Exchange
constructive algorithms
,
games
,
greedy
800
x14260
1672A
Log Chopping
games
,
implementation
,
math
800
x15849
1695A
Subrectangle Guess
games
800
x16113
1270A
Card Game
games
,
greedy
,
math
800
x16699
1673A
Subtle Substring Subtraction
games
,
greedy
,
strings
800
x18227
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