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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
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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
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Status
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Custom test
Problems
#
Name
2038A
Bonus Project
games
,
greedy
1400
x2083
2032F
Peanuts
combinatorics
,
dp
,
games
,
math
2700
x253
2030C
A TRUE Battle
brute force
,
games
,
greedy
1100
x15617
2030B
Minimise Oneness
combinatorics
,
constructive algorithms
,
games
,
math
800
x19932
2029B
Replacement
constructive algorithms
,
games
,
strings
1100
x8046
2028E
Alice's Adventures in the Rabbit Hole
combinatorics
,
dfs and similar
,
dp
,
games
,
greedy
,
math
,
probabilities
,
trees
2300
x1070
2027E1
Bit Game (Easy Version)
bitmasks
,
brute force
,
games
,
math
2800
x126
2013F1
Game in Tree (Easy Version)
binary search
,
brute force
,
data structures
,
dp
,
games
,
greedy
,
implementation
,
trees
2700
x473
2006A
Iris and Game on the Tree
constructive algorithms
,
dfs and similar
,
games
,
graphs
,
greedy
,
trees
1700
x6748
2005E2
Subtangle Game (Hard Version)
data structures
,
dp
,
games
,
greedy
,
implementation
2500
x796
2005E1
Subtangle Game (Easy Version)
dp
,
games
,
greedy
,
implementation
2100
x2686
2004E
Not a Nim Problem
brute force
,
games
,
math
,
number theory
2100
x4050
2004C
Splitting Items
games
,
greedy
,
sortings
1100
x23281
2003B
Turtle and Piggy Are Playing a Game 2
games
,
greedy
,
sortings
800
x25085
2002B
Removals Game
constructive algorithms
,
games
1000
x18816
1994H
Fortnite
combinatorics
,
constructive algorithms
,
games
,
greedy
,
hashing
,
interactive
,
math
,
number theory
,
strings
3500
x706
1991I
Grid Game
constructive algorithms
,
games
,
graph matchings
,
greedy
,
interactive
3500
x130
1991H
Prime Split Game
bitmasks
,
dp
,
fft
,
games
,
math
,
number theory
3300
x504
1991E
Coloring Game
constructive algorithms
,
dfs and similar
,
games
,
graphs
,
greedy
,
interactive
1900
x4222
1990A
Submission Bait
brute force
,
games
,
greedy
,
sortings
900
x22721
1987D
World is Mine
dp
,
games
1800
x7180
1972B
Coin Games
games
900
x21693
1970C3
Game on Tree (Hard)
dfs and similar
,
dp
,
games
,
trees
1900
x1591
1970C2
Game on Tree (Medium)
dfs and similar
,
dp
,
games
,
trees
1700
x2774
1970C1
Game on Tree (Easy)
games
1400
x3505
1968D
Permutation Game
brute force
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
1300
x14997
1966A
Card Exchange
constructive algorithms
,
games
,
greedy
800
x17927
1965E
Connected Cubes
constructive algorithms
,
games
3100
x305
1965A
Everything Nim
games
,
greedy
,
math
,
sortings
1400
x13808
1956B
Nene and the Card Game
games
,
greedy
800
x21305
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x21766
1955F
Unfair Game
dp
,
games
,
greedy
,
math
,
schedules
1800
x7157
1952E
Sweep Line
combinatorics
,
games
,
math
x258
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x284
1943A
MEX Game 1
games
,
greedy
1300
x18110
1942E
Farm Game
combinatorics
,
games
2300
x1696
1939D
Big Persimmon
*special problem
,
dp
,
games
x100
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1401
1931E
Anna and the Valentine's Day Gift
games
,
greedy
,
math
,
sortings
1400
x16183
1929C
Sasha and the Casino
binary search
,
brute force
,
constructive algorithms
,
games
,
greedy
,
math
1400
x15096
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x9912
1920B
Summation Game
games
,
greedy
,
math
,
sortings
1100
x21099
1919G
Tree LGM
constructive algorithms
,
divide and conquer
,
games
,
trees
3500
x183
1919A
Wallet Exchange
games
,
math
800
x33552
1916C
Training Before the Olympiad
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1200
x18002
1914E2
Game with Marbles (Hard Version)
games
,
greedy
,
sortings
1400
x12601
1914E1
Game with Marbles (Easy Version)
brute force
,
games
,
greedy
,
sortings
1400
x12397
1906G
Grid Game 2
games
,
number theory
2900
x211
1899A
Game with Integers
games
,
math
,
number theory
800
x48052
1895E
Infinite Card Game
binary search
,
brute force
,
data structures
,
dfs and similar
,
dp
,
dsu
,
games
,
graphs
,
greedy
,
sortings
,
two pointers
2300
x1587
1874A
Jellyfish and Game
brute force
,
games
,
greedy
,
implementation
1200
x17255
1873H
Mad City
dfs and similar
,
dsu
,
games
,
graphs
,
shortest paths
,
trees
1700
x7558
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x11375
1866I
Imagination Castle
dp
,
games
,
two pointers
2300
x772
1864E
Guess Game
bitmasks
,
data structures
,
games
,
math
,
probabilities
,
sortings
,
strings
,
trees
2100
x2675
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x13496
1858A
Buttons
games
,
greedy
,
math
800
x39809
1848A
Vika and Her Friends
games
,
math
900
x16954
1844A
Subtraction Game
constructive algorithms
,
games
800
x24663
1842A
Tenzing and Tsondu
games
,
math
800
x19879
1841A
Game with Board
constructive algorithms
,
games
800
x24787
1834C
Game with Reversing
games
,
greedy
,
math
,
strings
1200
x13453
1823E
Removing Graph
brute force
,
dp
,
games
,
graphs
,
math
2500
x1264
1817D
Toy Machine
constructive algorithms
,
games
,
implementation
2700
x789
1796E
Colored Subgraphs
dfs and similar
,
dp
,
games
,
greedy
,
trees
2500
x772
1784E
Infinite Game
brute force
,
combinatorics
,
dp
,
games
,
probabilities
3100
x347
1776I
Spinach Pizza
games
,
geometry
,
greedy
,
interactive
2500
x687
1776C
Library game
games
,
greedy
,
interactive
,
sortings
2500
x813
1773I
Interactive Factorial Guessing
brute force
,
games
,
implementation
,
interactive
2500
x492
1772E
Permutation Game
games
1700
x6842
1770D
Koxia and Game
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
flows
,
games
,
graph matchings
,
graphs
,
implementation
2000
x3889
1749C
Number Game
binary search
,
data structures
,
games
,
greedy
,
implementation
1400
x14092
1747C
Swap Game
games
1200
x21396
1740C
Bricks and Bags
constructive algorithms
,
games
,
greedy
,
sortings
1400
x11121
1739C
Card Game
combinatorics
,
constructive algorithms
,
dp
,
games
1500
x9164
1738C
Even Number Addicts
dp
,
games
,
greedy
,
math
1500
x11290
1737C
Ela and Crickets
constructive algorithms
,
games
,
implementation
,
math
1500
x5799
1728D
Letter Picking
constructive algorithms
,
dp
,
games
,
two pointers
1800
x7331
1719A
Chip Game
games
,
math
800
x25669
1710E
Two Arrays
binary search
,
games
,
graph matchings
2400
x507
1704F
Colouring Game
constructive algorithms
,
dp
,
games
2600
x1062
1695B
Circle Game
games
,
greedy
1000
x18587
1695A
Subrectangle Guess
games
800
x16381
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x23972
1681A
Game with Cards
games
,
greedy
800
x21035
1673A
Subtle Substring Subtraction
games
,
greedy
,
strings
800
x18475
1672A
Log Chopping
games
,
implementation
,
math
800
x16150
1665D
GCD Guess
bitmasks
,
chinese remainder theorem
,
constructive algorithms
,
games
,
interactive
,
math
,
number theory
2000
x4026
1659F
Tree and Permutation Game
dfs and similar
,
games
,
graphs
,
trees
3000
x192
1658E
Gojou and Matrix Game
data structures
,
dp
,
games
,
hashing
,
implementation
,
math
,
number theory
,
sortings
2500
x1060
1628D2
Game on Sum (Hard Version)
combinatorics
,
dp
,
games
,
math
2400
x2167
1628D1
Game on Sum (Easy Version)
combinatorics
,
dp
,
games
,
math
2100
x3225
1627B
Not Sitting
games
,
greedy
,
sortings
1300
x16692
1617E
Christmas Chocolates
dfs and similar
,
dp
,
games
,
graphs
,
implementation
,
math
,
number theory
,
shortest paths
,
trees
2700
x883
1615E
Purple Crayon
data structures
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
,
sortings
,
trees
2400
x1501
1610I
Mashtali vs AtCoder
games
,
trees
3100
x286
1605D
Treelabeling
bitmasks
,
constructive algorithms
,
dfs and similar
,
games
,
greedy
,
implementation
,
trees
2100
x2958
1600E
Array Game
games
,
greedy
,
two pointers
1900
x2125
1585G
Poachers
dp
,
games
,
graphs
,
trees
2500
x188
1584E
Game with Stones
binary search
,
data structures
,
games
,
greedy
2300
x1297
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