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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
3 days
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Difficulty:
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greedy
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
288A
Polo the Penguin and Strings
greedy
1300
x6292
485B
Valuable Resources
brute force
,
greedy
1300
x6451
572B
Order Book
data structures
,
greedy
,
implementation
,
sortings
1300
x6761
257B
Playing Cubes
games
,
greedy
,
implementation
1300
x6875
840A
Leha and Function
combinatorics
,
greedy
,
math
,
number theory
,
sortings
1300
x6956
1040B
Shashlik Cooking
dp
,
greedy
,
math
1300
x7015
135A
Replacement
greedy
,
implementation
,
sortings
1300
x7445
962B
Students in Railway Carriage
constructive algorithms
,
greedy
,
implementation
1300
x7592
1113B
Sasha and Magnetic Machines
greedy
,
number theory
1300
x7668
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8180
1062A
A Prank
greedy
,
implementation
1300
x8680
946C
String Transformation
greedy
,
strings
1300
x8773
870C
Maximum splitting
dp
,
greedy
,
math
,
number theory
1300
x8965
1315B
Homecoming
binary search
,
dp
,
greedy
,
strings
1300
x8968
1004B
Sonya and Exhibition
constructive algorithms
,
greedy
,
implementation
,
math
1300
x9219
665C
Simple Strings
dp
,
greedy
,
strings
1300
x9253
1093C
Mishka and the Last Exam
greedy
1300
x9285
1038C
Gambling
greedy
,
sortings
1300
x9340
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9351
509B
Painting Pebbles
constructive algorithms
,
greedy
,
implementation
1300
x9531
1942C1
Bessie's Birthday Cake (Easy Version)
geometry
,
greedy
,
math
1300
x9651
1107C
Brutality
greedy
,
sortings
,
two pointers
1300
x9660
1236C
Labs
constructive algorithms
,
greedy
,
implementation
1300
x9880
1119B
Alyona and a Narrow Fridge
binary search
,
flows
,
greedy
,
sortings
1300
x9891
1220C
Substring Game in the Lesson
games
,
greedy
,
strings
1300
x9906
1037B
Reach Median
greedy
1300
x10206
1271C
Shawarma Tent
brute force
,
geometry
,
greedy
,
implementation
1300
x10267
1101B
Accordion
greedy
,
implementation
1300
x10376
298A
Snow Footprints
greedy
,
implementation
1300
x10527
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x10614
1659B
Bit Flipping
bitmasks
,
constructive algorithms
,
greedy
,
strings
1300
x10646
810B
Summer sell-off
greedy
,
sortings
1300
x10935
1037A
Packets
constructive algorithms
,
greedy
,
math
1300
x10945
246B
Increase and Decrease
greedy
,
math
1300
x10981
1271B
Blocks
greedy
,
math
1300
x11108
1005C
Summarize to the Power of Two
brute force
,
greedy
,
implementation
1300
x11339
1178C
Tiles
combinatorics
,
greedy
,
math
1300
x11452
1774C
Ice and Fire
constructive algorithms
,
dp
,
greedy
1300
x11592
1585C
Minimize Distance
greedy
1300
x11599
1823C
Strongly Composite
greedy
,
math
,
number theory
1300
x11714
1108C
Nice Garland
brute force
,
greedy
,
math
1300
x11769
716B
Complete the Word
greedy
,
two pointers
1300
x11838
58B
Coins
greedy
1300
x11838
1968D
Permutation Game
brute force
,
dfs and similar
,
games
,
graphs
,
greedy
,
math
1300
x11932
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x12093
1889A
Qingshan Loves Strings 2
constructive algorithms
,
greedy
,
implementation
1300
x12101
1819A
Constructive Problem
brute force
,
greedy
1300
x12108
1322A
Unusual Competitions
greedy
1300
x12242
1945D
Seraphim the Owl
dp
,
greedy
1300
x12348
1902C
Insert and Equalize
brute force
,
constructive algorithms
,
greedy
,
math
,
number theory
1300
x12369
1746C
Permutation Operations
constructive algorithms
,
greedy
,
implementation
,
math
1300
x12384
1157C1
Increasing Subsequence (easy version)
greedy
1300
x12387
1647C
Madoka and Childish Pranks
constructive algorithms
,
greedy
1300
x12393
1794C
Scoring Subsequences
binary search
,
greedy
,
math
,
two pointers
1300
x12551
1165C
Good String
greedy
1300
x12679
1649B
Game of Ball Passing
greedy
,
implementation
1300
x12785
1826C
Dreaming of Freedom
greedy
,
math
,
number theory
1300
x12855
1778B
The Forbidden Permutation
greedy
,
math
1300
x12922
1307B
Cow and Friend
geometry
,
greedy
,
math
1300
x12942
1238B
Kill `Em All
greedy
,
sortings
1300
x13107
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x13244
1601A
Array Elimination
bitmasks
,
greedy
,
math
,
number theory
1300
x13327
1815A
Ian and Array Sorting
greedy
,
math
1300
x13511
1561C
Deep Down Below
binary search
,
greedy
,
sortings
1300
x13592
1768C
Elemental Decompress
constructive algorithms
,
greedy
,
implementation
,
sortings
1300
x13606
1926D
Vlad and Division
bitmasks
,
greedy
1300
x13751
1913C
Game with Multiset
binary search
,
bitmasks
,
brute force
,
greedy
1300
x13773
1291B
Array Sharpening
greedy
,
implementation
1300
x13829
1810C
Make It Permutation
brute force
,
greedy
,
sortings
1300
x13841
1176C
Lose it!
dp
,
greedy
,
implementation
1300
x13872
1873F
Money Trees
binary search
,
greedy
,
math
,
two pointers
1300
x13957
1899E
Queue Sort
greedy
,
implementation
,
sortings
1300
x14015
462B
Appleman and Card Game
greedy
1300
x14041
1422B
Nice Matrix
greedy
,
implementation
,
math
1300
x14183
1717C
Madoka and Formal Statement
greedy
1300
x14306
1753A1
Make Nonzero Sum (easy version)
constructive algorithms
,
dp
,
greedy
1300
x14344
1882B
Sets and Union
bitmasks
,
brute force
,
constructive algorithms
,
greedy
1300
x14361
1667A
Make it Increasing
brute force
,
greedy
,
math
1300
x14376
1157B
Long Number
greedy
1300
x14435
1617C
Paprika and Permutation
binary search
,
greedy
,
math
,
sortings
1300
x14614
1844C
Particles
dp
,
greedy
,
implementation
,
math
1300
x14899
1446A
Knapsack
constructive algorithms
,
greedy
,
sortings
1300
x14956
1879C
Make it Alternating
combinatorics
,
dp
,
greedy
1300
x15048
1249C1
Good Numbers (easy version)
brute force
,
greedy
,
implementation
1300
x15090
1615B
And It's Non-Zero
bitmasks
,
greedy
,
math
1300
x15260
1326C
Permutation Partitions
combinatorics
,
greedy
,
math
1300
x15296
1443B
Saving the City
dp
,
greedy
,
math
,
sortings
1300
x15515
1943A
MEX Game 1
games
,
greedy
1300
x15533
1693A
Directional Increase
greedy
1300
x15693
570B
Simple Game
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1300
x15790
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x15904
1547D
Co-growing Sequence
bitmasks
,
constructive algorithms
,
greedy
1300
x16096
1498B
Box Fitting
binary search
,
bitmasks
,
data structures
,
greedy
1300
x16180
1627B
Not Sitting
games
,
greedy
,
sortings
1300
x16301
1418B
Negative Prefixes
greedy
,
sortings
1300
x16303
1607D
Blue-Red Permutation
greedy
,
math
,
sortings
1300
x16428
1788C
Matching Numbers
constructive algorithms
,
greedy
,
math
1300
x16517
1669H
Maximal AND
bitmasks
,
greedy
,
math
1300
x16525
1574C
Slay the Dragon
binary search
,
greedy
,
sortings
,
ternary search
1300
x16592
1407B
Big Vova
brute force
,
greedy
,
math
,
number theory
1300
x16698
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