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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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implementation
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
Standings
Custom test
Problems
#
Name
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x23760
1712A
Wonderful Permutation
greedy
,
implementation
800
x23762
1778A
Flip Flop Sum
greedy
,
implementation
800
x23794
1627A
Not Shading
constructive algorithms
,
implementation
800
x23818
1539B
Love Song
dp
,
implementation
,
strings
800
x23820
1549B
Gregor and the Pawn Game
dfs and similar
,
dp
,
flows
,
graph matchings
,
graphs
,
greedy
,
implementation
800
x23839
448A
Rewards
implementation
800
x23930
988A
Diverse Team
brute force
,
implementation
800
x23951
1766A
Extremely Round
brute force
,
implementation
800
x24140
1180A
Alex and a Rhombus
dp
,
implementation
,
math
800
x24275
1183A
Nearest Interesting Number
implementation
800
x24331
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24381
1041A
Heist
greedy
,
implementation
,
sortings
800
x24572
1916A
2023
constructive algorithms
,
implementation
,
math
,
number theory
800
x24624
1845A
Forbidden Integer
constructive algorithms
,
implementation
,
math
,
number theory
800
x24746
1690B
Array Decrements
greedy
,
implementation
800
x24817
1512B
Almost Rectangle
implementation
800
x25039
1569A
Balanced Substring
implementation
800
x25287
1651A
Playoff
implementation
800
x25384
1697A
Parkway Walk
greedy
,
implementation
800
x25437
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x25513
1856A
Tales of a Sort
implementation
800
x25843
1814A
Coins
implementation
,
math
800
x25881
1701A
Grass Field
implementation
800
x25881
1922A
Tricky Template
constructive algorithms
,
implementation
,
strings
800
x25932
1547B
Alphabetical Strings
greedy
,
implementation
,
strings
800
x25997
1391B
Fix You
brute force
,
greedy
,
implementation
800
x26113
1560C
Infinity Table
implementation
,
math
800
x26136
978A
Remove Duplicates
implementation
800
x26137
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x26153
1743A
Password
brute force
,
combinatorics
,
implementation
,
math
800
x26181
1487A
Arena
implementation
,
sortings
800
x26204
1744A
Number Replacement
greedy
,
implementation
800
x26461
1003A
Polycarp's Pockets
implementation
800
x26489
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x26617
1721A
Image
greedy
,
implementation
800
x26642
1644A
Doors and Keys
implementation
800
x26919
119A
Epic Game
implementation
800
x26937
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x27000
1849A
Morning Sandwich
implementation
,
math
800
x27112
1829C
Mr. Perfectly Fine
bitmasks
,
greedy
,
implementation
800
x27234
330A
Cakeminator
brute force
,
implementation
800
x27511
1454B
Unique Bid Auction
implementation
800
x27614
255A
Greg's Workout
implementation
800
x27761
1788A
One and Two
brute force
,
implementation
,
math
800
x27801
599A
Patrick and Shopping
implementation
800
x27902
1971B
Different String
implementation
,
strings
800
x27905
1433B
Yet Another Bookshelf
greedy
,
implementation
800
x28007
1772B
Matrix Rotation
brute force
,
implementation
800
x28236
34A
Reconnaissance 2
implementation
800
x28567
734B
Anton and Digits
brute force
,
greedy
,
implementation
,
math
800
x28574
1918A
Brick Wall
constructive algorithms
,
greedy
,
implementation
,
math
800
x28848
711A
Bus to Udayland
brute force
,
implementation
800
x28852
1759A
Yes-Yes?
implementation
,
strings
800
x28868
1220A
Cards
implementation
,
sortings
,
strings
800
x28896
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x28915
1632A
ABC
implementation
800
x28951
1541A
Pretty Permutations
constructive algorithms
,
greedy
,
implementation
800
x29016
1709A
Three Doors
brute force
,
greedy
,
implementation
,
math
800
x29094
1807C
Find and Replace
greedy
,
implementation
,
strings
800
x29283
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x29425
1095A
Repeating Cipher
implementation
800
x29555
1722C
Word Game
data structures
,
implementation
800
x29615
1567A
Domino Disaster
implementation
,
strings
800
x29678
1914A
Problemsolving Log
implementation
,
strings
800
x29903
1547A
Shortest Path with Obstacle
implementation
,
math
800
x29926
1741A
Compare T-Shirt Sizes
implementation
,
implementation
,
strings
800
x29931
1926B
Vlad and Shapes
geometry
,
implementation
800
x30015
1800A
Is It a Cat?
implementation
,
strings
800
x30080
1619B
Squares and Cubes
implementation
,
math
800
x30113
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x30158
1303A
Erasing Zeroes
implementation
,
strings
800
x30652
1862A
Gift Carpet
dp
,
greedy
,
implementation
,
strings
800
x30958
1846A
Rudolph and Cut the Rope
implementation
,
math
800
x31459
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x31487
540A
Combination Lock
implementation
800
x31642
1833A
Musical Puzzle
implementation
,
strings
800
x31665
822A
I'm bored with life
implementation
,
math
,
number theory
800
x31768
1921B
Arranging Cats
greedy
,
implementation
800
x32107
1692C
Where's the Bishop?
implementation
800
x32618
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x32720
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x32846
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x32905
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x33033
1971A
My First Sorting Problem
implementation
,
sortings
800
x33617
1950B
Upscaling
implementation
800
x33879
1650A
Deletions of Two Adjacent Letters
implementation
,
strings
800
x33960
1703C
Cypher
brute force
,
implementation
,
strings
800
x34294
1907A
Rook
implementation
800
x34308
265A
Colorful Stones (Simplified Edition)
implementation
800
x34603
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x34963
1760C
Advantage
data structures
,
implementation
,
sortings
800
x35198
1950C
Clock Conversion
implementation
,
math
800
x35446
1873C
Target Practice
implementation
,
math
800
x35673
686A
Free Ice Cream
constructive algorithms
,
implementation
800
x35706
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35741
1607A
Linear Keyboard
implementation
,
strings
800
x36166
1186A
Vus the Cossack and a Contest
implementation
800
x36322
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36967
1097A
Gennady and a Card Game
brute force
,
implementation
800
x37166
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