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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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data structures
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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Problems
#
Name
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14557
1104B
Game with string
data structures
,
implementation
,
math
1200
x14514
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14508
1296C
Yet Another Walking Robot
data structures
,
implementation
1500
x14469
1638C
Inversion Graph
data structures
,
dsu
,
graphs
,
math
1300
x14393
1234D
Distinct Characters Queries
data structures
1600
x14230
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x13980
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x13969
1763B
Incinerate
binary search
,
brute force
,
data structures
,
implementation
,
math
,
sortings
1200
x13955
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x13885
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x13864
1566D1
Seating Arrangements (easy version)
data structures
,
greedy
,
sortings
1100
x13787
427B
Prison Transfer
data structures
,
implementation
1100
x13727
380C
Sereja and Brackets
data structures
,
schedules
2000
x13659
1536C
Diluc and Kaeya
data structures
,
dp
,
hashing
,
number theory
1500
x13594
1374E1
Reading Books (easy version)
data structures
,
greedy
,
sortings
1600
x13541
349B
Color the Fence
data structures
,
dp
,
greedy
,
implementation
1700
x13522
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x13473
1749C
Number Game
binary search
,
data structures
,
games
,
greedy
,
implementation
1400
x13441
1654C
Alice and the Cake
data structures
,
greedy
,
implementation
,
sortings
1400
x13174
1340A
Nastya and Strange Generator
brute force
,
data structures
,
greedy
,
implementation
1500
x13148
1621B
Integers Shop
data structures
,
greedy
,
implementation
1500
x13123
343B
Alternating Current
data structures
,
greedy
,
implementation
1600
x13074
1955D
Inaccurate Subsequence Search
data structures
,
two pointers
1400
x13053
1292A
NEKO's Maze Game
data structures
,
dsu
,
implementation
1400
x12947
1719C
Fighting Tournament
binary search
,
data structures
,
implementation
,
two pointers
1400
x12894
1214C
Bad Sequence
data structures
,
greedy
1200
x12868
356A
Knight Tournament
data structures
,
dsu
1500
x12821
1283C
Friends and Gifts
constructive algorithms
,
data structures
,
math
1500
x12803
1381A2
Prefix Flip (Hard Version)
constructive algorithms
,
data structures
,
implementation
,
strings
,
two pointers
1700
x12774
5C
Longest Regular Bracket Sequence
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
,
strings
1900
x12738
600E
Lomsat gelral
data structures
,
dfs and similar
,
dsu
,
trees
2300
x12730
86D
Powerful array
data structures
,
implementation
,
math
,
two pointers
2200
x12596
18C
Stripe
data structures
,
implementation
1200
x12515
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x12504
1499C
Minimum Grid Path
brute force
,
data structures
,
greedy
,
math
1500
x12359
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12306
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x12280
1474C
Array Destruction
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1700
x12228
1343D
Constant Palindrome Sum
brute force
,
data structures
,
greedy
,
two pointers
1700
x12221
1333C
Eugene and an array
binary search
,
data structures
,
implementation
,
two pointers
1700
x12190
1872E
Data Structures Fan
binary search
,
bitmasks
,
data structures
,
dp
1500
x12136
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x12093
1805C
Place for a Selfie
binary search
,
data structures
,
geometry
,
math
1400
x12060
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x11998
879B
Table Tennis
data structures
,
implementation
1200
x11890
1779C
Least Prefix Sum
data structures
,
greedy
1600
x11877
1648A
Weird Sum
combinatorics
,
data structures
,
geometry
,
math
,
matrices
,
sortings
1400
x11828
1416A
k-Amazing Numbers
binary search
,
data structures
,
implementation
,
two pointers
1500
x11783
1593E
Gardener and Tree
brute force
,
data structures
,
dfs and similar
,
greedy
,
implementation
,
trees
1600
x11737
1915F
Greetings
data structures
,
divide and conquer
,
sortings
1500
x11727
701B
Cells Not Under Attack
data structures
,
math
1200
x11586
1791F
Range Update Point Query
binary search
,
brute force
,
data structures
1500
x11574
577B
Modulo Sum
combinatorics
,
data structures
,
dp
,
two pointers
1900
x11526
1795C
Tea Tasting
binary search
,
data structures
,
implementation
1500
x11506
1279C
Stack of Presents
data structures
,
implementation
1400
x11434
1799A
Recent Actions
data structures
,
greedy
,
implementation
,
math
800
x11369
1294D
MEX maximizing
data structures
,
greedy
,
implementation
,
math
1600
x11333
702B
Powers of Two
brute force
,
data structures
,
implementation
,
math
1500
x11322
1850G
The Morning Star
combinatorics
,
data structures
,
geometry
,
implementation
,
math
,
sortings
1500
x11295
1878E
Iva & Pav
binary search
,
bitmasks
,
data structures
,
greedy
1400
x11218
1856C
To Become Max
binary search
,
brute force
,
data structures
,
dp
1600
x11139
1843E
Tracking Segments
binary search
,
brute force
,
data structures
,
two pointers
1600
x11063
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10949
1100B
Build a Contest
data structures
,
implementation
1300
x10916
1466D
13th Labour of Heracles
data structures
,
greedy
,
sortings
,
trees
1500
x10841
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10782
1904C
Array Game
binary search
,
brute force
,
data structures
,
sortings
,
two pointers
1400
x10778
1626C
Monsters And Spells
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
math
,
two pointers
1700
x10639
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10615
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x10614
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10596
1748C
Zero-Sum Prefixes
brute force
,
data structures
,
dp
,
greedy
,
implementation
1600
x10517
1700C
Helping the Nature
constructive algorithms
,
data structures
,
greedy
1700
x10493
1857F
Sum and Product
binary search
,
data structures
,
math
1600
x10492
1651C
Fault-tolerant Network
brute force
,
data structures
,
implementation
1500
x10490
1335E1
Three Blocks Palindrome (easy version)
binary search
,
brute force
,
data structures
,
dp
,
two pointers
1700
x10480
1695C
Zero Path
brute force
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x10414
1189C
Candies!
data structures
,
dp
,
implementation
,
math
1400
x10380
1817A
Almost Increasing Subsequence
binary search
,
data structures
,
greedy
1500
x10371
271D
Good Substrings
data structures
,
strings
1800
x10360
1175B
Catch Overflow!
data structures
,
expression parsing
,
implementation
1600
x10326
1926E
Vlad and an Odd Ordering
binary search
,
bitmasks
,
data structures
,
dp
,
implementation
,
math
,
number theory
1500
x10182
61E
Enemy is weak
data structures
,
trees
1900
x10151
1179A
Valeriy and Deque
data structures
,
implementation
1500
x10146
1722E
Counting Rectangles
brute force
,
data structures
,
dp
,
implementation
1600
x10124
1313C1
Skyscrapers (easy version)
brute force
,
data structures
,
dp
,
greedy
1500
x10114
1676H2
Maximum Crossings (Hard Version)
data structures
,
divide and conquer
,
sortings
1500
x10086
1883D
In Love
data structures
,
greedy
1500
x10074
1909C
Heavy Intervals
constructive algorithms
,
data structures
,
dsu
,
greedy
,
math
,
sortings
1400
x10049
1679C
Rooks Defenders
data structures
,
implementation
1400
x9918
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x9892
1400D
Zigzags
brute force
,
combinatorics
,
data structures
,
math
,
two pointers
1900
x9833
1973B
Cat, Fox and the Lonely Array
binary search
,
bitmasks
,
data structures
,
greedy
,
math
,
two pointers
x9815
1862E
Kolya and Movie Theatre
constructive algorithms
,
data structures
,
greedy
1600
x9689
459D
Pashmak and Parmida's problem
data structures
,
divide and conquer
,
sortings
1800
x9541
1670C
Where is the Pizza?
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
,
math
1400
x9535
1861C
Queries for the Array
data structures
,
dfs and similar
,
implementation
,
strings
,
trees
1600
x9514
1196D2
RGB Substring (hard version)
data structures
,
dp
,
implementation
,
two pointers
1600
x9490
1829G
Hits Different
data structures
,
dp
,
implementation
,
math
1600
x9479
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