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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
38:33:58
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Difficulty:
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constructive algorithms
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
582B
Once Again...
constructive algorithms
,
dp
,
matrices
1900
x3291
1677C
Tokitsukaze and Two Colorful Tapes
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1900
x3365
1157D
N Problems During K Days
constructive algorithms
,
greedy
,
math
1900
x3456
1041E
Tree Reconstruction
constructive algorithms
,
data structures
,
graphs
,
greedy
1900
x3484
1823D
Unique Palindromes
constructive algorithms
,
math
,
strings
1900
x3587
1012B
Chemical table
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
matrices
1900
x3634
1817B
Fish Graph
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
1900
x3770
1659D
Reverse Sort Sum
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
,
two pointers
1900
x3833
1842D
Tenzing and His Animal Friends
constructive algorithms
,
graphs
,
greedy
1900
x3853
862C
Mahmoud and Ehab and the xor
constructive algorithms
1900
x3909
1421D
Hexagons
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
shortest paths
1900
x4039
1453D
Checkpoints
brute force
,
constructive algorithms
,
greedy
,
math
,
probabilities
1900
x4064
1178E
Archaeology
brute force
,
constructive algorithms
,
greedy
,
strings
1900
x4095
1237C2
Balanced Removals (Harder)
binary search
,
constructive algorithms
,
divide and conquer
,
greedy
,
implementation
,
sortings
1900
x4115
1759G
Restore the Permutation
binary search
,
constructive algorithms
,
data structures
,
greedy
,
math
1900
x4137
1717D
Madoka and The Corruption Scheme
combinatorics
,
constructive algorithms
,
greedy
,
math
1900
x4206
1463D
Pairs
binary search
,
constructive algorithms
,
greedy
,
two pointers
1900
x4209
1697D
Guess The String
binary search
,
constructive algorithms
,
interactive
1900
x4227
894C
Marco and GCD Sequence
constructive algorithms
,
math
1900
x4262
476D
Dreamoon and Sets
constructive algorithms
,
greedy
,
math
1900
x4298
1270D
Strange Device
constructive algorithms
,
interactive
,
math
,
sortings
1900
x4355
1428D
Bouncing Boomerangs
constructive algorithms
,
greedy
,
implementation
1900
x4386
1747D
Yet Another Problem
binary search
,
bitmasks
,
constructive algorithms
,
data structures
1900
x4414
1174D
Ehab and the Expected XOR Problem
bitmasks
,
constructive algorithms
1900
x4575
1305D
Kuroni and the Celebration
constructive algorithms
,
dfs and similar
,
interactive
,
trees
1900
x4687
1383B
GameGame
bitmasks
,
constructive algorithms
,
dp
,
games
,
greedy
,
math
1900
x4723
1704D
Magical Array
constructive algorithms
,
hashing
,
implementation
,
math
1900
x4786
1202D
Print a 1337-string...
combinatorics
,
constructive algorithms
,
math
,
strings
1900
x4829
1213E
Two Small Strings
brute force
,
constructive algorithms
1900
x4864
803C
Maximal GCD
constructive algorithms
,
greedy
,
math
1900
x4883
1439A2
Binary Table (Hard Version)
constructive algorithms
,
graphs
,
greedy
,
implementation
1900
x4928
1228D
Complete Tripartite
brute force
,
constructive algorithms
,
graphs
,
hashing
,
implementation
1900
x4958
1475F
Unusual Matrix
2-sat
,
brute force
,
constructive algorithms
1900
x5037
1647D
Madoka and the Best School in Russia
constructive algorithms
,
dp
,
math
,
number theory
1900
x5066
1696D
Permutation Graph
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
shortest paths
1900
x5113
1895D
XOR Construction
bitmasks
,
constructive algorithms
,
data structures
,
math
,
string suffix structures
,
trees
1900
x5391
1264B
Beautiful Sequence
brute force
,
constructive algorithms
,
greedy
1900
x5519
1342D
Multiple Testcases
binary search
,
constructive algorithms
,
data structures
,
greedy
,
sortings
,
two pointers
1900
x5811
1560F1
Nearest Beautiful Number (easy version)
binary search
,
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
greedy
1900
x5858
1492D
Genius's Gambit
bitmasks
,
constructive algorithms
,
greedy
,
math
1900
x5905
1508A
Binary Literature
constructive algorithms
,
greedy
,
implementation
,
strings
,
two pointers
1900
x5936
459C
Pashmak and Buses
combinatorics
,
constructive algorithms
,
math
1900
x6045
1467C
Three Bags
constructive algorithms
,
greedy
1900
x6179
1656D
K-good
constructive algorithms
,
math
,
number theory
1900
x6528
1854A2
Dual (Hard Version)
constructive algorithms
,
math
1900
x6571
1479B1
Painting the Array I
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
1900
x6689
1360G
A/B Matrix
constructive algorithms
,
greedy
,
math
1900
x7343
1365E
Maximum Subsequence Value
brute force
,
constructive algorithms
1900
x7454
1527B2
Palindrome Game (hard version)
constructive algorithms
,
games
1900
x7465
1620E
Replace the Numbers
constructive algorithms
,
data structures
,
dsu
,
implementation
1900
x7642
1348D
Phoenix and Science
binary search
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x8437
1375D
Replace by MEX
brute force
,
constructive algorithms
,
sortings
1900
x8646
5C
Longest Regular Bracket Sequence
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
,
strings
1900
x12419
1571D
Sweepstake
*special problem
,
brute force
,
constructive algorithms
,
implementation
,
math
1800
x313
45J
Planting Trees
constructive algorithms
1800
x876
883K
Road Widening
constructive algorithms
,
greedy
,
implementation
1800
x1064
238B
Boring Partition
constructive algorithms
1800
x1258
370C
Mittens
constructive algorithms
,
greedy
,
sortings
1800
x1497
727D
T-shirts Distribution
constructive algorithms
,
flows
,
greedy
1800
x1790
452B
4-point polyline
brute force
,
constructive algorithms
,
geometry
,
trees
1800
x1968
1090D
Similar Arrays
constructive algorithms
1800
x1979
142B
Help General
constructive algorithms
,
greedy
,
implementation
1800
x2121
145B
Lucky Number 2
constructive algorithms
1800
x2136
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2154
847C
Sum of Nestings
constructive algorithms
1800
x2313
141C
Queue
constructive algorithms
,
greedy
,
sortings
1800
x2358
730B
Minimum and Maximum
constructive algorithms
,
interactive
1800
x2370
538D
Weird Chess
brute force
,
constructive algorithms
,
implementation
1800
x2403
1725H
Hot Black Hot White
constructive algorithms
,
math
1800
x2462
1250B
The Feast and the Bus
brute force
,
constructive algorithms
,
greedy
,
math
1800
x2549
899D
Shovel Sale
constructive algorithms
,
math
1800
x2662
610C
Harmony Analysis
constructive algorithms
1800
x2775
1267L
Lexicography
constructive algorithms
,
strings
1800
x2793
1846F
Rudolph and Mimic
constructive algorithms
,
implementation
,
interactive
1800
x2801
641C
Little Artem and Dance
brute force
,
constructive algorithms
,
implementation
1800
x2833
873D
Merge Sort
constructive algorithms
,
divide and conquer
1800
x2977
301A
Yaroslav and Sequence
constructive algorithms
1800
x2983
1666C
Connect the Points
brute force
,
constructive algorithms
,
geometry
1800
x3031
665D
Simple Subset
constructive algorithms
,
greedy
,
number theory
1800
x3166
663A
Rebus
constructive algorithms
,
expression parsing
,
greedy
,
math
1800
x3215
733C
Epidemic in Monstropolis
constructive algorithms
,
dp
,
greedy
,
two pointers
1800
x3285
827B
High Load
constructive algorithms
,
greedy
,
implementation
,
trees
1800
x3429
1196E
Connected Component on a Chessboard
constructive algorithms
,
implementation
1800
x3482
1082D
Maximum Diameter Graph
constructive algorithms
,
graphs
,
implementation
1800
x3531
1904D2
Set To Max (Hard Version)
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
implementation
,
sortings
1800
x3617
989C
A Mist of Florescence
constructive algorithms
,
graphs
1800
x3636
551B
ZgukistringZ
brute force
,
constructive algorithms
,
implementation
,
strings
1800
x3746
1508B
Almost Sorted
binary search
,
combinatorics
,
constructive algorithms
,
implementation
1800
x3791
1852B
Imbalanced Arrays
constructive algorithms
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
1800
x4034
1740E
Hanging Hearts
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
greedy
,
trees
1800
x4052
1109B
Sasha and One More Name
constructive algorithms
,
hashing
,
strings
1800
x4235
1179B
Tolik and His Uncle
constructive algorithms
1800
x4282
623A
Graph and String
constructive algorithms
,
graphs
1800
x4302
1286B
Numbers on Tree
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x4315
1254B1
Send Boxes to Alice (Easy Version)
constructive algorithms
,
greedy
,
math
,
number theory
,
ternary search
,
two pointers
1800
x4349
894B
Ralph And His Magic Field
combinatorics
,
constructive algorithms
,
math
,
number theory
1800
x4354
1016D
Vasya And The Matrix
constructive algorithms
,
flows
,
math
1800
x4361
1617D1
Too Many Impostors (easy version)
constructive algorithms
,
implementation
,
interactive
1800
x4492
1780D
Bit Guessing Game
binary search
,
bitmasks
,
constructive algorithms
,
interactive
1800
x4583
1833G
Ksyusha and Chinchilla
constructive algorithms
,
dfs and similar
,
dp
,
dsu
,
greedy
,
implementation
,
trees
1800
x4794
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