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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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brute force
combine-tags-by-or
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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
1195B
Sport Mafia
binary search
,
brute force
,
math
1000
x19165
1562B
Scenes From a Memory
brute force
,
constructive algorithms
,
implementation
,
math
,
number theory
1000
x19197
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x19261
1775A1
Gardener and the Capybaras (easy version)
brute force
,
constructive algorithms
,
implementation
800
x19336
1323A
Even Subset Sum Problem
brute force
,
dp
,
greedy
,
implementation
800
x19383
1352E
Special Elements
brute force
,
implementation
,
two pointers
1500
x19417
1476B
Inflation
binary search
,
brute force
,
greedy
,
math
1300
x19510
66B
Petya and Countryside
brute force
,
implementation
1100
x19569
1917B
Erase First or Second Letter
brute force
,
combinatorics
,
data structures
,
dp
,
strings
1100
x19570
550B
Preparing Olympiad
bitmasks
,
brute force
1400
x19590
1633C
Kill the Monster
brute force
,
math
1100
x19650
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x19708
1832B
Maximum Sum
brute force
,
sortings
,
two pointers
1100
x19786
1623A
Robot Cleaner
brute force
,
implementation
,
math
800
x19901
1380C
Create The Teams
brute force
,
dp
,
greedy
,
implementation
,
sortings
1400
x19939
1536A
Omkar and Bad Story
brute force
,
constructive algorithms
800
x20048
1272A
Three Friends
brute force
,
greedy
,
math
,
sortings
900
x20066
1200A
Hotelier
brute force
,
data structures
,
implementation
800
x20069
855A
Tom Riddle's Diary
brute force
,
implementation
,
strings
800
x20202
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x20226
1020B
Badge
brute force
,
dfs and similar
,
graphs
1000
x20251
1499B
Binary Removals
brute force
,
dp
,
greedy
,
implementation
1000
x20303
1496A
Split it!
brute force
,
constructive algorithms
,
greedy
,
strings
900
x20306
1810A
Beautiful Sequence
brute force
,
greedy
800
x20377
1494A
ABC String
bitmasks
,
brute force
,
implementation
900
x20440
217A
Ice Skating
brute force
,
dfs and similar
,
dsu
,
graphs
1200
x20452
1644B
Anti-Fibonacci Permutation
brute force
,
constructive algorithms
,
implementation
800
x20475
1430A
Number of Apartments
brute force
,
constructive algorithms
,
math
900
x20484
1950D
Product of Binary Decimals
brute force
,
dp
,
implementation
,
number theory
1100
x20595
1948B
Array Fix
brute force
,
dp
,
greedy
,
implementation
1100
x20648
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x20704
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20782
1734A
Select Three Sticks
brute force
,
greedy
,
sortings
800
x20790
1688A
Cirno's Perfect Bitmasks Classroom
bitmasks
,
brute force
800
x20874
1646B
Quality vs Quantity
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
800
x20884
1485A
Add and Divide
brute force
,
greedy
,
math
,
number theory
1000
x20931
1269A
Equation
brute force
,
math
800
x20932
1555C
Coin Rows
brute force
,
constructive algorithms
,
dp
,
implementation
1300
x20942
22A
Second Order Statistics
brute force
800
x20982
1230A
Dawid and Bags of Candies
brute force
,
implementation
800
x21007
1680A
Minimums and Maximums
brute force
,
math
800
x21041
798A
Mike and palindrome
brute force
,
constructive algorithms
,
strings
1000
x21098
1795B
Ideal Point
brute force
,
geometry
,
greedy
900
x21216
1805A
We Need the Zero
bitmasks
,
brute force
800
x21239
1228A
Distinct Digits
brute force
,
implementation
800
x21263
1526C1
Potions (Easy Version)
brute force
,
data structures
,
dp
,
greedy
1500
x21298
1207A
There Are Two Types Of Burgers
brute force
,
greedy
,
implementation
,
math
800
x21393
1692F
3SUM
brute force
,
math
1300
x21450
205A
Little Elephant and Rozdil
brute force
,
implementation
900
x21602
535B
Tavas and SaDDas
bitmasks
,
brute force
,
combinatorics
,
implementation
1100
x21699
1064A
Make a triangle!
brute force
,
geometry
,
math
800
x21732
1742D
Coprime
brute force
,
greedy
,
number theory
1100
x21860
1176A
Divide it!
brute force
,
greedy
,
implementation
800
x21938
300A
Array
brute force
,
constructive algorithms
,
implementation
1100
x21951
1875A
Jellyfish and Undertale
brute force
,
greedy
900
x22017
1679A
AvtoBus
brute force
,
greedy
,
math
,
number theory
900
x22043
1406B
Maximum Product
brute force
,
dp
,
greedy
,
implementation
,
sortings
1200
x22083
1637A
Sorting Parts
brute force
,
sortings
800
x22100
1285C
Fadi and LCM
brute force
,
math
,
number theory
1400
x22145
1511C
Yet Another Card Deck
brute force
,
data structures
,
implementation
,
trees
1100
x22275
483A
Counterexample
brute force
,
implementation
,
math
,
number theory
1100
x22279
1466A
Bovine Dilemma
brute force
,
geometry
,
math
800
x22289
999A
Mishka and Contest
brute force
,
implementation
800
x22321
1005B
Delete from the Left
brute force
,
implementation
,
strings
900
x22443
1736A
Make A Equal to B
brute force
,
greedy
,
sortings
800
x22464
1108B
Divisors of Two Integers
brute force
,
greedy
,
math
,
number theory
1100
x22474
1617B
GCD Problem
brute force
,
constructive algorithms
,
math
,
number theory
900
x22497
1498A
GCD Sum
brute force
,
math
800
x22680
1409C
Yet Another Array Restoration
brute force
,
math
,
number theory
1200
x22764
1598A
Computer Game
brute force
,
dfs and similar
,
dp
,
implementation
800
x22818
1770A
Koxia and Whiteboards
brute force
,
greedy
1000
x22926
1790C
Premutation
brute force
,
implementation
,
math
1000
x23023
1614A
Divan and a Store
brute force
,
constructive algorithms
,
greedy
800
x23070
378A
Playing with Dice
brute force
800
x23159
1795A
Two Towers
brute force
,
implementation
,
strings
800
x23269
1380A
Three Indices
brute force
,
data structures
900
x23463
1395A
Boboniu Likes to Color Balls
brute force
,
math
1000
x23472
1506C
Double-ended Strings
brute force
,
implementation
,
strings
1000
x23501
1822A
TubeTube Feed
brute force
,
implementation
800
x23677
1657A
Integer Moves
brute force
,
math
800
x23716
371C
Hamburgers
binary search
,
brute force
1600
x23779
1497A
Meximization
brute force
,
data structures
,
greedy
,
sortings
800
x23917
988A
Diverse Team
brute force
,
implementation
800
x23952
1855B
Longest Divisors Interval
brute force
,
combinatorics
,
greedy
,
math
,
number theory
900
x24013
1676D
X-Sum
brute force
,
greedy
,
implementation
1000
x24101
1766A
Extremely Round
brute force
,
implementation
800
x24144
1515B
Phoenix and Puzzle
brute force
,
geometry
,
math
,
number theory
1000
x24207
1829D
Gold Rush
brute force
,
dfs and similar
,
dp
,
implementation
1000
x24371
1607C
Minimum Extraction
brute force
,
sortings
1000
x24373
1728A
Colored Balls: Revisited
brute force
,
greedy
,
implementation
,
sortings
800
x24383
1703D
Double Strings
brute force
,
data structures
,
strings
1100
x24493
1388A
Captain Flint and Crew Recruitment
brute force
,
greedy
,
math
,
number theory
800
x24562
1886A
Sum of Three
brute force
,
constructive algorithms
,
math
800
x24603
1903A
Halloumi Boxes
brute force
,
greedy
,
sortings
800
x24692
352A
Jeff and Digits
brute force
,
implementation
,
math
1000
x24709
199A
Hexadecimal's theorem
brute force
,
constructive algorithms
,
implementation
,
number theory
900
x25201
224A
Parallelepiped
brute force
,
geometry
,
math
1100
x25458
1345B
Card Constructions
binary search
,
brute force
,
dp
,
math
1100
x25522
1355A
Sequence with Digits
brute force
,
implementation
,
math
1200
x25548
1490B
Balanced Remainders
brute force
,
constructive algorithms
,
math
1000
x25644
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