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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
30:49:40
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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
687C
The Values You Can Make
dp
1900
x5646
685B
Kay and Snowflake
data structures
,
dfs and similar
,
dp
,
trees
1900
x4167
685A
Robbers' watch
brute force
,
combinatorics
,
dp
,
math
1700
x4244
682D
Alyona and Strings
dp
,
strings
1900
x3337
682C
Alyona and the Tree
dfs and similar
,
dp
,
graphs
,
trees
1600
x7288
679B
Bear and Tower of Cubes
binary search
,
dp
,
greedy
2200
x2152
678E
Another Sith Tournament
bitmasks
,
dp
,
math
,
probabilities
2200
x2234
677E
Vanya and Balloons
binary search
,
brute force
,
dp
,
implementation
2300
x603
677D
Vanya and Treasure
data structures
,
dp
,
graphs
,
shortest paths
2300
x1704
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x19061
675E
Trains and Statistic
data structures
,
dp
,
greedy
2300
x2791
671D
Roads in Yusland
data structures
,
dp
,
greedy
2900
x1183
671A
Recycling Bottles
dp
,
geometry
,
greedy
,
implementation
1800
x4193
666A
Reberland Linguistics
dp
,
implementation
,
strings
1800
x3554
665F
Four Divisors
data structures
,
dp
,
math
,
number theory
,
sortings
,
two pointers
2400
x622
665C
Simple Strings
dp
,
greedy
,
strings
1300
x10656
662E
To Hack or not to Hack
brute force
,
dp
,
greedy
3100
x139
662C
Binary Table
bitmasks
,
brute force
,
divide and conquer
,
dp
,
fft
,
math
2600
x2037
660C
Hard Process
binary search
,
dp
,
two pointers
1600
x9546
659G
Fence Divercity
combinatorics
,
dp
,
number theory
2300
x1208
653B
Bear and Compressing
brute force
,
dfs and similar
,
dp
,
strings
1300
x5017
651A
Joysticks
dp
,
greedy
,
implementation
,
math
1100
x23053
650D
Zip-line
binary search
,
data structures
,
dp
,
hashing
2600
x1359
650C
Table Compression
dfs and similar
,
dp
,
dsu
,
graphs
,
greedy
2200
x2027
650B
Image Preview
binary search
,
brute force
,
dp
,
two pointers
1900
x3358
645E
Intellectual Inquiry
dp
,
greedy
,
strings
2200
x1269
645D
Robot Rapping Results Report
binary search
,
dp
,
graphs
1800
x2934
643F
Bears and Juice
dp
,
math
,
meet-in-the-middle
2900
x717
643E
Bear and Destroying Subtrees
dp
,
math
,
probabilities
,
trees
2700
x640
643C
Levels and Regions
dp
2400
x1401
641D
Little Artem and Random Variable
dp
,
implementation
,
math
,
probabilities
2400
x1280
637D
Running with Obstacles
*special problem
,
data structures
,
dp
,
greedy
1600
x2024
633F
The Chocolate Spree
dfs and similar
,
dp
,
graphs
,
trees
2600
x1002
633D
Fibonacci-ish
brute force
,
dp
,
hashing
,
implementation
,
math
2000
x2816
633C
Spy Syndrome 2
data structures
,
dp
,
hashing
,
implementation
,
sortings
,
string suffix structures
,
strings
1900
x2791
632E
Thief in a Shop
divide and conquer
,
dp
,
fft
,
math
2400
x2834
631E
Product Sum
data structures
,
dp
,
geometry
2600
x2418
629E
Famil Door and Roads
combinatorics
,
data structures
,
dfs and similar
,
dp
,
probabilities
,
trees
2300
x1024
629D
Babaei and Birthday Cake
data structures
,
dp
2000
x4056
629C
Famil Door and Brackets
dp
,
strings
2000
x2803
628D
Magic Numbers
dp
2200
x6144
628B
New Skateboard
dp
1300
x10899
627D
Preorder Test
binary search
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x874
627A
XOR Equation
dp
,
math
1700
x4248
626G
Raffles
data structures
,
dp
,
greedy
,
math
3100
x534
626F
Group Projects
dp
2400
x2960
626D
Jerry's Protest
brute force
,
combinatorics
,
dp
,
probabilities
1800
x2767
626B
Cards
constructive algorithms
,
dp
,
math
1300
x6633
623E
Transforming Sequence
combinatorics
,
dp
,
fft
,
math
3300
x550
623C
Electric Charges
binary search
,
dp
2900
x481
623B
Array GCD
dp
,
greedy
,
number theory
2300
x2163
621E
Wet Shark and Blocks
dp
,
matrices
2000
x2871
618G
Combining Slimes
dp
,
math
,
matrices
,
probabilities
3300
x241
618D
Hamiltonian Spanning Tree
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
2200
x1747
615C
Running Track
dp
,
greedy
,
strings
,
trees
2000
x2330
615B
Longtail Hedgehog
dp
,
graphs
1600
x5123
613E
Puzzle Lover
dp
,
hashing
,
strings
3200
x474
613D
Kingdom and its Cities
dfs and similar
,
divide and conquer
,
dp
,
graphs
,
sortings
,
trees
2800
x3057
613B
Skills
binary search
,
brute force
,
dp
,
greedy
,
sortings
,
two pointers
1900
x2239
612F
Simba on the Circle
dp
2600
x392
611D
New Year and Ancient Prophecy
dp
,
hashing
,
strings
2000
x2601
611C
New Year and Domino
dp
,
implementation
1500
x8509
607B
Zuma
dp
1900
x12471
607A
Chain Reaction
binary search
,
dp
1600
x9656
603A
Alternative Thinking
dp
,
greedy
,
math
1600
x7691
602B
Approximating a Constant Range
dp
,
implementation
,
two pointers
1400
x10939
601E
A Museum Robbery
data structures
,
dp
2800
x874
601C
Kleofáš and the n-thlon
dp
,
math
,
probabilities
2300
x1335
599E
Sandy and Nuts
bitmasks
,
dp
,
trees
2600
x671
598E
Chocolate Bar
brute force
,
dp
2000
x5094
597C
Subsequences
data structures
,
dp
1900
x5087
597B
Restaurant
dp
,
greedy
,
sortings
1600
x4880
596E
Wilbur and Strings
dfs and similar
,
dp
,
graphs
,
strings
2500
x393
596D
Wilbur and Trees
dp
,
math
,
probabilities
,
sortings
2300
x685
593E
Strange Calculation and Cats
dp
,
matrices
2400
x643
592D
Super M
dfs and similar
,
dp
,
graphs
,
trees
2200
x2645
590D
Top Secret Task
dp
2300
x1214
587B
Duff in Beach
dp
2100
x1425
585F
Digits of Number Pi
dp
,
implementation
,
strings
3200
x687
582E
Boolean Function
bitmasks
,
dp
,
expression parsing
3000
x499
582D
Number of Binominal Coefficients
dp
,
math
,
number theory
3300
x658
582B
Once Again...
constructive algorithms
,
dp
,
matrices
1900
x3449
581F
Zublicanes and Mumocrates
dp
,
trees
,
two pointers
2400
x879
581E
Kojiro and Furrari
dp
,
greedy
2800
x191
580D
Kefa and Dishes
bitmasks
,
dp
1800
x9928
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x89291
578D
LCS Again
dp
,
greedy
2700
x874
577B
Modulo Sum
combinatorics
,
data structures
,
dp
,
two pointers
1900
x12339
576D
Flights for Regular Customers
dp
,
matrices
2700
x1421
575H
Bots
combinatorics
,
dp
,
math
,
number theory
1800
x1692
575F
Bulbo
dp
,
greedy
2100
x1040
573D
Bear and Cavalry
data structures
,
divide and conquer
,
dp
3000
x567
573B
Bear and Blocks
binary search
,
data structures
,
dp
,
math
1600
x5960
571B
Minimization
dp
,
greedy
,
sortings
2000
x2657
570E
Pig and Palindromes
combinatorics
,
dp
2300
x1909
568E
Longest Increasing Subsequence
data structures
,
dp
3000
x600
568B
Symmetric and Transitive
combinatorics
,
dp
,
math
1900
x2251
567F
Mausoleum
dp
2400
x586
567C
Geometric Progression
binary search
,
data structures
,
dp
1700
x9605
566F
Clique in the Divisibility Graph
dp
,
math
,
number theory
1500
x3652
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