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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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Difficulty:
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dp
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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Custom test
Problems
#
Name
1234C
Pipes
dp
,
implementation
1500
x12224
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x12458
1646C
Factorials and Powers of Two
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
math
1500
x13254
1553D
Backspace
dp
,
greedy
,
strings
,
two pointers
1500
x13364
1536C
Diluc and Kaeya
data structures
,
dp
,
hashing
,
number theory
1500
x13594
1253C
Sweets Eating
dp
,
greedy
,
math
,
sortings
1500
x13824
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x13884
1391C
Cyclic Permutations
combinatorics
,
dp
,
graphs
,
math
1500
x14566
1492C
Maximum width
binary search
,
data structures
,
dp
,
greedy
,
two pointers
1500
x15617
1304C
Air Conditioner
dp
,
greedy
,
implementation
,
sortings
,
two pointers
1500
x15803
1272D
Remove One Element
brute force
,
dp
1500
x15868
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x15959
1516B
AGAGA XOOORRR
bitmasks
,
brute force
,
dp
,
greedy
1500
x18162
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x18197
1418C
Mortal Kombat Tower
dp
,
graphs
,
greedy
,
shortest paths
1500
x18314
1385D
a-Good String
bitmasks
,
brute force
,
divide and conquer
,
dp
,
implementation
1500
x18408
1389C
Good String
brute force
,
dp
,
greedy
,
two pointers
1500
x18412
1538F
Interesting Function
binary search
,
dp
,
math
,
number theory
1500
x18416
166E
Tetrahedron
dp
,
math
,
matrices
1500
x20035
1526C1
Potions (Easy Version)
brute force
,
data structures
,
dp
,
greedy
1500
x21294
545C
Woodcutters
dp
,
greedy
1500
x26326
550C
Divisibility by Eight
brute force
,
dp
,
math
1500
x27341
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36417
455A
Boredom
dp
1500
x54574
174B
File List
dp
,
greedy
,
implementation
1400
x2191
928B
Chat
*special problem
,
dp
1400
x2507
120F
Spiders
dp
,
greedy
,
trees
1400
x3510
44E
Anfisa the Monkey
dp
1400
x4834
180C
Letter
dp
1400
x7081
359B
Permutation
constructive algorithms
,
dp
,
math
1400
x7733
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x8283
940B
Our Tanya is Crying Out Loud
dp
,
greedy
1400
x8856
1609C
Complex Market Analysis
binary search
,
dp
,
implementation
,
number theory
,
schedules
,
two pointers
1400
x9516
534B
Covered Path
dp
,
greedy
,
math
1400
x9891
1895C
Torn Lucky Ticket
brute force
,
dp
,
hashing
,
implementation
,
math
1400
x10158
797B
Odd sum
dp
,
greedy
,
implementation
1400
x10177
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x10337
1189C
Candies!
data structures
,
dp
,
implementation
,
math
1400
x10380
602B
Approximating a Constant Range
dp
,
implementation
,
two pointers
1400
x10457
1284B
New Year and Ascent Sequence
binary search
,
combinatorics
,
data structures
,
dp
,
implementation
,
sortings
1400
x10596
1415C
Bouncing Ball
brute force
,
dp
,
implementation
1400
x10673
1282B1
K for the Price of One (Easy Version)
dp
,
greedy
,
sortings
1400
x11179
1276A
As Simple as One and Two
dp
,
greedy
1400
x12050
505B
Mr. Kitayuta's Colorful Graph
dfs and similar
,
dp
,
dsu
,
graphs
1400
x12114
1215B
The Number of Products
combinatorics
,
dp
,
implementation
1400
x12119
1847C
Vampiric Powers, anyone?
bitmasks
,
brute force
,
dp
,
greedy
1400
x12267
1461B
Find the Spruce
brute force
,
dp
,
implementation
1400
x12369
1860C
Game on Permutation
data structures
,
dp
,
games
,
greedy
1400
x12503
1830A
Copil Copac Draws Trees
dfs and similar
,
dp
,
graphs
,
trees
1400
x12521
1771B
Hossam and Friends
binary search
,
constructive algorithms
,
dp
,
two pointers
1400
x12938
987C
Three displays
brute force
,
dp
,
implementation
1400
x13123
1845C
Strong Password
binary search
,
dp
,
greedy
,
strings
1400
x13396
1644C
Increase Subarray Sums
brute force
,
dp
,
greedy
,
implementation
1400
x13403
1706C
Qpwoeirut And The City
dp
,
flows
,
greedy
,
implementation
1400
x14465
1108D
Diverse Garland
constructive algorithms
,
dp
,
greedy
1400
x14718
1451C
String Equality
dp
,
greedy
,
hashing
,
implementation
,
strings
1400
x15227
1320A
Journey Planning
data structures
,
dp
,
greedy
,
math
,
sortings
1400
x15504
1692G
2^Sort
data structures
,
dp
,
sortings
,
two pointers
1400
x16074
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16122
289B
Polo the Penguin and Matrix
brute force
,
dp
,
implementation
,
sortings
,
ternary search
1400
x16781
1245C
Constanze's Machine
dp
1400
x16814
1919C
Grouping Increases
data structures
,
dp
,
greedy
1400
x16939
538B
Quasi Binary
constructive algorithms
,
dp
,
greedy
,
implementation
1400
x17639
1380C
Create The Teams
brute force
,
dp
,
greedy
,
implementation
,
sortings
1400
x19939
1350B
Orac and Models
dp
,
math
,
number theory
1400
x20687
414B
Mashmokh and ACM
combinatorics
,
dp
,
number theory
1400
x20947
1195C
Basketball Exercise
dp
1400
x24186
698A
Vacations
dp
1400
x28592
1526B
I Hate 1111
dp
,
math
,
number theory
1400
x28872
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x44654
1769C2
Подкрутка II
*special problem
,
dp
1300
x916
653B
Bear and Compressing
brute force
,
dfs and similar
,
dp
,
strings
1300
x4893
234C
Weather
dp
,
implementation
1300
x5342
626B
Cards
constructive algorithms
,
dp
,
math
1300
x6525
1040B
Shashlik Cooking
dp
,
greedy
,
math
1300
x7015
798B
Mike and strings
brute force
,
dp
,
strings
1300
x8274
416B
Art Union
brute force
,
dp
,
implementation
1300
x8533
870C
Maximum splitting
dp
,
greedy
,
math
,
number theory
1300
x8965
1315B
Homecoming
binary search
,
dp
,
greedy
,
strings
1300
x8968
665C
Simple Strings
dp
,
greedy
,
strings
1300
x9251
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9351
628B
New Skateboard
dp
1300
x10346
1900C
Anji's Binary Tree
dfs and similar
,
dp
,
trees
1300
x10505
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10782
1774C
Ice and Fire
constructive algorithms
,
dp
,
greedy
1300
x11589
1945D
Seraphim the Owl
dp
,
greedy
1300
x12345
1534C
Little Alawn's Puzzle
combinatorics
,
dp
,
dsu
,
graphs
,
math
1300
x12522
1766C
Hamiltonian Wall
dp
,
implementation
1300
x13148
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x13240
1553B
Reverse String
brute force
,
dp
,
hashing
,
implementation
,
strings
1300
x13848
1176C
Lose it!
dp
,
greedy
,
implementation
1300
x13872
1459B
Move and Turn
dp
,
math
1300
x13970
1178B
WOW Factor
dp
,
strings
1300
x14103
1676G
White-Black Balanced Subtrees
dfs and similar
,
dp
,
graphs
,
trees
1300
x14291
1753A1
Make Nonzero Sum (easy version)
constructive algorithms
,
dp
,
greedy
1300
x14342
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x14619
1844C
Particles
dp
,
greedy
,
implementation
,
math
1300
x14897
1879C
Make it Alternating
combinatorics
,
dp
,
greedy
1300
x15048
1443B
Saving the City
dp
,
greedy
,
math
,
sortings
1300
x15515
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x17042
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