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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
5 days
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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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Custom test
Problems
#
Name
959A
Mahmoud and Ehab and the even-odd game
games
,
math
800
x44384
1899A
Game with Integers
games
,
math
,
number theory
800
x38411
1858A
Buttons
games
,
greedy
,
math
800
x34582
1919A
Wallet Exchange
games
,
math
800
x31834
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x25453
1719A
Chip Game
games
,
math
800
x25042
1841A
Game with Board
constructive algorithms
,
games
800
x24259
1398B
Substring Removal Game
games
,
greedy
,
sortings
800
x24109
1844A
Subtraction Game
constructive algorithms
,
games
800
x23901
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x23502
1681A
Game with Cards
games
,
greedy
800
x20758
832A
Sasha and Sticks
games
,
math
800
x20392
1842A
Tenzing and Tsondu
games
,
math
800
x19483
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x19232
1956B
Nene and the Card Game
games
,
greedy
800
x19074
1673A
Subtle Substring Subtraction
games
,
greedy
,
strings
800
x18235
1270A
Card Game
games
,
greedy
,
math
800
x16704
1695A
Subrectangle Guess
games
800
x16123
1672A
Log Chopping
games
,
implementation
,
math
800
x15855
1966A
Card Exchange
constructive algorithms
,
games
,
greedy
800
x14875
1373B
01 Game
games
900
x33017
1419A
Digit Game
games
,
greedy
,
implementation
900
x19279
1972B
Coin Games
games
900
x16550
1848A
Vika and Her Friends
games
,
math
900
x16262
1695B
Circle Game
games
,
greedy
1000
x18051
616B
Dinner with Emma
games
,
greedy
1000
x11318
1382B
Sequential Nim
dp
,
games
1100
x23936
1365A
Matrix Game
games
,
greedy
,
implementation
1100
x23601
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x19381
1455C
Ping-pong
constructive algorithms
,
games
,
math
1100
x19256
841B
Godsend
games
,
math
1100
x11990
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10948
705B
Spider Man
games
,
math
1100
x9051
1472D
Even-Odd Game
dp
,
games
,
greedy
,
sortings
1200
x26135
1527B1
Palindrome Game (easy version)
constructive algorithms
,
games
1200
x24370
1747C
Swap Game
games
1200
x20420
1916C
Training Before the Olympiad
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1200
x16771
1874A
Jellyfish and Game
brute force
,
games
,
greedy
,
implementation
1200
x15876
1102C
Doors Breaking and Repairing
games
1200
x12805
1834C
Game with Reversing
games
,
greedy
,
math
,
strings
1200
x12682
1155B
Game with Telephone Numbers
games
,
greedy
,
implementation
1200
x11738
914B
Conan and Agasa play a Card Game
games
,
greedy
,
implementation
1200
x8510
630R
Game
games
,
math
1200
x8321
276B
Little Girl and Game
games
,
greedy
1300
x27325
1627B
Not Sitting
games
,
greedy
,
sortings
1300
x16298
570B
Simple Game
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1300
x15788
1943A
MEX Game 1
games
,
greedy
1300
x15508
1968D
Permutation Game
brute force
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
1300
x11863
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x10611
1220C
Substring Game in the Lesson
games
,
greedy
,
strings
1300
x9904
257B
Playing Cubes
games
,
greedy
,
implementation
1300
x6875
1370C
Number Game
games
,
math
,
number theory
1400
x23600
546C
Soldier and Cards
brute force
,
dfs and similar
,
games
1400
x17096
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x13484
1749C
Number Game
binary search
,
data structures
,
games
,
greedy
,
implementation
1400
x13424
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x13369
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x12501
1914E2
Game with Marbles (Hard Version)
games
,
greedy
,
sortings
1400
x11311
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x11210
1740C
Bricks and Bags
constructive algorithms
,
games
,
greedy
,
sortings
1400
x10597
1965A
Everything Nim
games
,
greedy
,
math
,
sortings
1400
x10556
150A
Win or Freeze
games
,
math
,
number theory
1400
x7597
934A
A Compatible Pair
brute force
,
games
1400
x6707
1425A
Arena of Greed
games
,
greedy
1400
x6369
120E
Put Knight!
games
,
math
1400
x2649
1970C1
Game on Tree (Easy)
games
1400
x1618
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x10609
1739C
Card Game
combinatorics
,
constructive algorithms
,
dp
,
games
1500
x8732
1737C
Ela and Crickets
constructive algorithms
,
games
,
implementation
,
math
1500
x5571
859C
Pie Rules
dp
,
games
1500
x5273
293A
Weird Game
games
,
greedy
1500
x2814
74B
Train
dp
,
games
,
greedy
1500
x1494
1363C
Game On Leaves
games
,
trees
1600
x17881
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x8966
346A
Alice and Bob
games
,
math
,
number theory
1600
x8471
197A
Plate Game
constructive algorithms
,
games
,
math
1600
x6047
1033C
Permutation Game
brute force
,
dp
,
games
1600
x5387
1537D
Deleting Divisors
games
,
math
,
number theory
1700
x11894
493D
Vasya and Chess
constructive algorithms
,
games
,
math
1700
x9532
1451D
Circle Game
games
,
geometry
,
math
1700
x9273
1503B
3-Coloring
constructive algorithms
,
games
,
interactive
1700
x6848
1873H
Mad City
dfs and similar
,
dsu
,
games
,
graphs
,
shortest paths
,
trees
1700
x6633
1772E
Permutation Game
games
1700
x6440
1194D
1-2-K Game
games
,
math
1700
x6350
1215D
Ticket Game
games
,
greedy
,
math
1700
x5975
980C
Posterized
games
,
greedy
1700
x3725
917B
MADMAX
dfs and similar
,
dp
,
games
,
graphs
1700
x3492
533C
Board Game
games
,
greedy
,
implementation
,
math
1700
x2147
1970C2
Game on Tree (Medium)
dfs and similar
,
dp
,
games
,
trees
1700
x1261
1396B
Stoned Game
brute force
,
constructive algorithms
,
games
,
greedy
1800
x10901
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x6897
3C
Tic-tac-toe
brute force
,
games
,
implementation
1800
x6895
148D
Bag of mice
dp
,
games
,
math
,
probabilities
1800
x6807
1190B
Tokitsukaze, CSL and Stone Game
games
1800
x6305
1955F
Unfair Game
dp
,
games
,
greedy
,
math
,
schedules
1800
x5985
794C
Naming Company
games
,
greedy
,
sortings
1800
x3039
1527B2
Palindrome Game (hard version)
constructive algorithms
,
games
1900
x7574
1404B
Tree Tag
dfs and similar
,
dp
,
games
,
trees
1900
x7098
1495B
Let's Go Hiking
games
,
greedy
1900
x5849
455B
A Lot of Games
dfs and similar
,
dp
,
games
,
implementation
,
strings
,
trees
1900
x5685
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