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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
5 days
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→ Filter Problems
Difficulty:
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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
Submit
Status
Standings
Custom test
Problems
#
Name
459B
Pashmak and Flowers
combinatorics
,
implementation
,
sortings
1300
x38593
1389A
LCM Problem
constructive algorithms
,
greedy
,
math
,
number theory
800
x38557
1342A
Road To Zero
greedy
,
math
1000
x38487
1348A
Phoenix and Balance
greedy
,
math
800
x38441
1899A
Game with Integers
games
,
math
,
number theory
800
x38411
1325A
EhAb AnD gCd
constructive algorithms
,
greedy
,
number theory
800
x38323
577A
Multiplication Table
implementation
,
number theory
1000
x38230
1358A
Park Lighting
greedy
,
math
800
x38213
556A
Case of the Zeros and Ones
greedy
900
x38042
149A
Business trip
greedy
,
implementation
,
sortings
900
x37915
1579A
Casimir's String Solitaire
math
,
strings
800
x37890
1915C
Can I Square?
binary search
,
implementation
800
x37879
519B
A and B and Compilation Errors
data structures
,
implementation
,
sortings
1100
x37825
1385A
Three Pairwise Maximums
math
800
x37656
499B
Lecture
implementation
,
strings
1000
x37605
1872A
Two Vessels
brute force
,
greedy
,
math
800
x37446
509A
Maximum in Table
brute force
,
implementation
800
x37327
1955A
Yogurt Sale
math
800
x37215
1097A
Gennady and a Card Game
brute force
,
implementation
800
x37160
1335B
Construct the String
constructive algorithms
900
x37156
1327A
Sum of Odd Integers
math
1100
x37029
977B
Two-gram
implementation
,
strings
900
x36993
1368A
C+=
brute force
,
greedy
,
implementation
,
math
800
x36959
433B
Kuriyama Mirai's Stones
dp
,
implementation
,
sortings
1200
x36549
1343C
Alternating Subsequence
dp
,
greedy
,
two pointers
1200
x36465
124A
The number of positions
math
1000
x36428
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36412
1385B
Restore the Permutation by Merger
greedy
800
x36341
1186A
Vus the Cossack and a Contest
implementation
800
x36316
1337A
Ichihime and Triangle
constructive algorithms
,
math
800
x36202
1537A
Arithmetic Array
greedy
,
math
800
x36169
1607A
Linear Keyboard
implementation
,
strings
800
x36164
467B
Fedor and New Game
bitmasks
,
brute force
,
constructive algorithms
,
implementation
1100
x36088
1538A
Stone Game
brute force
,
dp
,
greedy
800
x35830
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35736
686A
Free Ice Cream
constructive algorithms
,
implementation
800
x35701
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35664
1369A
FashionabLee
geometry
,
math
800
x35662
1873C
Target Practice
implementation
,
math
800
x35653
1593A
Elections
math
800
x35633
1352B
Same Parity Summands
constructive algorithms
,
math
1200
x35518
1521A
Nastia and Nearly Good Numbers
constructive algorithms
,
math
,
number theory
1000
x35480
1950C
Clock Conversion
implementation
,
math
800
x35422
478B
Random Teams
combinatorics
,
constructive algorithms
,
greedy
,
math
1300
x35375
1760C
Advantage
data structures
,
implementation
,
sortings
800
x35191
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x35158
1660A
Vasya and Coins
greedy
,
math
800
x35128
978B
File Name
greedy
,
strings
800
x35109
1325B
CopyCopyCopyCopyCopy
greedy
,
implementation
800
x34960
1560B
Who's Opposite?
math
800
x34776
466C
Number of Ways
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x34680
265A
Colorful Stones (Simplified Edition)
implementation
800
x34595
1858A
Buttons
games
,
greedy
,
math
800
x34582
1363A
Odd Selection
brute force
,
implementation
,
math
1200
x34493
1624B
Make AP
implementation
,
math
900
x34412
1907A
Rook
implementation
800
x34297
1703C
Cypher
brute force
,
implementation
,
strings
800
x34292
1353C
Board Moves
math
1000
x34269
1527A
And Then There Were K
bitmasks
800
x34048
1650A
Deletions of Two Adjacent Letters
implementation
,
strings
800
x33957
1950B
Upscaling
implementation
800
x33854
320A
Magic Numbers
brute force
,
greedy
900
x33819
1931A
Recovering a Small String
brute force
,
strings
800
x33750
214A
System of Equations
brute force
800
x33750
1702A
Round Down the Price
constructive algorithms
800
x33525
1971A
My First Sorting Problem
implementation
,
sortings
800
x33397
1335C
Two Teams Composing
binary search
,
greedy
,
implementation
,
sortings
1100
x33372
1337B
Kana and Dragon Quest game
greedy
,
implementation
,
math
900
x33146
1843A
Sasha and Array Coloring
greedy
,
sortings
,
two pointers
800
x33081
1669C
Odd/Even Increments
greedy
,
greedy
,
implementation
,
math
800
x33024
1373B
01 Game
games
900
x33016
894A
QAQ
brute force
,
dp
800
x33007
115A
Party
dfs and similar
,
graphs
,
trees
900
x32917
1692B
All Distinct
greedy
,
sortings
800
x32908
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x32904
1873D
1D Eraser
greedy
,
implementation
,
two pointers
800
x32839
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x32707
450A
Jzzhu and Children
implementation
1000
x32657
1850D
Balanced Round
brute force
,
greedy
,
implementation
,
sortings
900
x32651
1690A
Print a Pedestal (Codeforces logo?)
constructive algorithms
,
greedy
800
x32628
1692C
Where's the Bishop?
implementation
800
x32611
977C
Less or Equal
sortings
1200
x32481
1294C
Product of Three Numbers
greedy
,
math
,
number theory
1300
x32470
1921B
Arranging Cats
greedy
,
implementation
800
x32102
1633A
Div. 7
brute force
800
x31958
1919A
Wallet Exchange
games
,
math
800
x31834
822A
I'm bored with life
implementation
,
math
,
number theory
800
x31764
1360C
Similar Pairs
constructive algorithms
,
graph matchings
,
greedy
,
sortings
1100
x31758
1833A
Musical Puzzle
implementation
,
strings
800
x31664
1618A
Polycarp and Sums of Subsequences
math
,
sortings
800
x31638
540A
Combination Lock
implementation
800
x31638
1675A
Food for Animals
greedy
,
math
800
x31631
1490C
Sum of Cubes
binary search
,
brute force
,
brute force
,
math
1100
x31529
1716A
2-3 Moves
greedy
,
math
800
x31517
459A
Pashmak and Garden
implementation
1200
x31490
1372A
Omkar and Completion
constructive algorithms
,
implementation
800
x31484
1846A
Rudolph and Cut the Rope
implementation
,
math
800
x31458
1549A
Gregor and Cryptography
math
,
number theory
800
x31438
1462C
Unique Number
brute force
,
greedy
,
math
900
x31363
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x31246
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