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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
09:14:43
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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
1929A
Sasha and the Beautiful Array
constructive algorithms
,
greedy
,
math
,
sortings
800
x31760
1928A
Rectangle Cutting
geometry
,
math
800
x22827
1927A
Make it White
greedy
,
strings
800
x43958
1926B
Vlad and Shapes
geometry
,
implementation
800
x32787
1926A
Vlad and the Best of Five
implementation
800
x49113
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x29014
1923A
Moving Chips
greedy
,
implementation
800
x24818
1922A
Tricky Template
constructive algorithms
,
implementation
,
strings
800
x27101
1921B
Arranging Cats
greedy
,
implementation
800
x33983
1921A
Square
greedy
,
math
800
x43786
1920A
Satisfying Constraints
brute force
,
greedy
,
math
800
x27980
1919B
Plus-Minus Split
greedy
800
x29852
1919A
Wallet Exchange
games
,
math
800
x33559
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x30407
1917A
Least Product
constructive algorithms
,
math
800
x25640
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x26167
1915C
Can I Square?
binary search
,
implementation
800
x43544
1915B
Not Quite Latin Square
bitmasks
,
brute force
,
implementation
800
x42873
1915A
Odd One Out
bitmasks
,
implementation
800
x58564
1914B
Preparing for the Contest
constructive algorithms
,
math
800
x30567
1914A
Problemsolving Log
implementation
,
strings
800
x32057
1913A
Rating Increase
implementation
800
x25375
1912L
LOL Lovers
strings
800
x7131
1909A
Distinct Buttons
implementation
,
math
800
x18019
1907A
Rook
implementation
800
x37123
1905A
Constructive Problems
constructive algorithms
,
math
800
x23091
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x33963
1902A
Binary Imbalance
constructive algorithms
800
x21293
1901A
Line Trip
greedy
,
math
800
x33845
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
800
x29246
1899A
Game with Integers
games
,
math
,
number theory
800
x48113
1898A
Milica and String
brute force
,
implementation
,
strings
800
x16146
1896A
Jagged Swaps
sortings
800
x25359
1895B
Points and Minimum Distance
greedy
,
math
,
sortings
800
x20551
1895A
Treasure Chest
math
800
x24546
1894A
Secret Sport
implementation
,
strings
800
x19061
1891A
Sorting with Twos
constructive algorithms
,
sortings
800
x19343
1890B
Qingshan Loves Strings
constructive algorithms
,
implementation
800
x17613
1890A
Doremy's Paint 3
constructive algorithms
800
x27864
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x26013
1884A
Simple Design
brute force
,
greedy
,
math
800
x17581
1883A
Morning
math
800
x25911
1882A
Increasing Sequence
greedy
800
x25518
1881A
Don't Try to Count
brute force
,
strings
800
x32985
1879A
Rigged!
greedy
800
x23247
1878B
Aleksa and Stack
constructive algorithms
,
math
800
x31651
1878A
How Much Does Daytona Cost?
greedy
800
x45862
1877A
Goals of Victory
math
800
x24512
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x35758
1873C
Target Practice
implementation
,
math
800
x41978
1873B
Good Kid
brute force
,
greedy
,
math
800
x49826
1873A
Short Sort
brute force
,
implementation
800
x55504
1872A
Two Vessels
brute force
,
greedy
,
math
800
x39484
1870A
MEXanized Array
constructive algorithms
,
greedy
,
math
800
x19137
1867A
green_gold_dog, array and permutation
constructive algorithms
,
sortings
800
x20054
1866A
Ambitious Kid
math
800
x23307
1864A
Increasing and Decreasing
constructive algorithms
,
greedy
,
implementation
,
math
800
x20401
1863A
Channel
greedy
,
implementation
800
x17977
1862B
Sequence Game
constructive algorithms
800
x33073
1862A
Gift Carpet
dp
,
greedy
,
implementation
,
strings
800
x32741
1861A
Prime Deletion
constructive algorithms
,
math
800
x24026
1859A
United We Stand
constructive algorithms
,
math
,
number theory
800
x33524
1858A
Buttons
games
,
greedy
,
math
800
x39848
1857A
Array Coloring
greedy
,
math
800
x49668
1856A
Tales of a Sort
implementation
800
x26698
1855A
Dalton the Teacher
greedy
,
math
800
x28262
1853A
Desorting
brute force
,
greedy
,
math
800
x32881
1851B
Parity Sort
greedy
,
sortings
,
two pointers
800
x29552
1851A
Escalator Conversations
brute force
,
constructive algorithms
,
math
800
x29666
1850C
Word on the Paper
implementation
,
strings
800
x44977
1850B
Ten Words of Wisdom
implementation
,
sortings
800
x43410
1850A
To My Critics
implementation
,
sortings
800
x57729
1849A
Morning Sandwich
implementation
,
math
800
x29869
1847A
The Man who became a God
greedy
,
sortings
800
x22074
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x27013
1846A
Rudolph and Cut the Rope
implementation
,
math
800
x32624
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x28328
1844A
Subtraction Game
constructive algorithms
,
games
800
x24664
1843C
Sum in Binary Tree
bitmasks
,
combinatorics
,
math
,
trees
800
x33694
1843B
Long Long
greedy
,
math
,
two pointers
800
x29298
1843A
Sasha and Array Coloring
greedy
,
sortings
,
two pointers
800
x34468
1842A
Tenzing and Tsondu
games
,
math
800
x19891
1841A
Game with Board
constructive algorithms
,
games
800
x24788
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x34374
1839A
The Good Array
greedy
,
implementation
,
math
800
x17545
1838A
Blackboard List
constructive algorithms
,
math
800
x21622
1837A
Grasshopper on a Line
constructive algorithms
,
math
800
x33452
1836A
Destroyer
implementation
,
sortings
800
x20406
1834A
Unit Array
greedy
,
math
800
x25291
1833C
Vlad Building Beautiful Array
greedy
,
math
800
x26244
1833A
Musical Puzzle
implementation
,
strings
800
x32830
1832A
New Palindrome
strings
800
x25917
1831A
Twin Permutations
constructive algorithms
800
x27710
1829C
Mr. Perfectly Fine
bitmasks
,
greedy
,
implementation
800
x28901
1829B
Blank Space
implementation
800
x47558
1829A
Love Story
implementation
,
strings
800
x52404
1828A
Divisible Array
constructive algorithms
,
math
800
x23798
1825A
LuoTianyi and the Palindrome String
greedy
,
strings
800
x19740
1823A
A-characteristic
combinatorics
,
constructive algorithms
,
math
800
x16227
1822C
Bun Lover
math
800
x23164
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