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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
24:03:01
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Difficulty:
—
implementation
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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Problems
#
Name
731F
Video Cards
brute force
,
data structures
,
implementation
,
math
,
number theory
1900
x2741
1926G
Vlad and Trouble at MIT
dfs and similar
,
dp
,
flows
,
graphs
,
greedy
,
implementation
,
trees
1900
x2688
374C
Inna and Dima
dfs and similar
,
dp
,
graphs
,
implementation
1900
x2636
1032D
Barcelonian Distance
geometry
,
implementation
1900
x2617
633C
Spy Syndrome 2
data structures
,
dp
,
hashing
,
implementation
,
sortings
,
string suffix structures
,
strings
1900
x2566
388B
Fox and Minimal path
bitmasks
,
constructive algorithms
,
graphs
,
implementation
,
math
1900
x2427
1054D
Changing Array
greedy
,
implementation
1900
x2207
353B
Two Heaps
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
,
sortings
1900
x2167
549D
Haar Features
greedy
,
implementation
1900
x2121
553B
Kyoya and Permutation
binary search
,
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x2093
404D
Minesweeper 1D
dp
,
implementation
1900
x2042
356B
Xenia and Hamming
implementation
,
math
1900
x1881
848B
Rooter's Song
constructive algorithms
,
data structures
,
geometry
,
implementation
,
sortings
,
two pointers
1900
x1809
21A
Jabber ID
implementation
,
strings
1900
x1755
1912A
Accumulator Apex
data structures
,
implementation
,
sortings
1900
x1714
746E
Numbers Exchange
greedy
,
implementation
,
math
1900
x1703
362C
Insertion Sort
data structures
,
dp
,
implementation
,
math
1900
x1632
653C
Bear and Up-Down
brute force
,
implementation
1900
x1620
1120A
Diana and Liana
greedy
,
implementation
,
two pointers
1900
x1612
819B
Mister B and PR Shifts
data structures
,
implementation
,
math
1900
x1609
285D
Permutation Sum
bitmasks
,
combinatorics
,
dp
,
implementation
,
meet-in-the-middle
1900
x1502
16D
Logging
implementation
,
strings
1900
x1500
847I
Noise Level
dfs and similar
,
implementation
,
math
1900
x1495
452D
Washer, Dryer, Folder
greedy
,
implementation
1900
x1468
420C
Bug in Code
data structures
,
graphs
,
implementation
,
two pointers
1900
x1184
119B
Before Exam
constructive algorithms
,
implementation
,
sortings
1900
x1059
784F
Crunching Numbers Just for You
*special problem
,
implementation
1900
x948
928C
Dependency management
*special problem
,
graphs
,
implementation
1900
x878
412E
E-mail Addresses
implementation
1900
x805
38D
Vasya the Architect
implementation
1900
x466
784D
Touchy-Feely Palindromes
*special problem
,
implementation
1900
x419
1370D
Odd-Even Subsequence
binary search
,
dp
,
dsu
,
greedy
,
implementation
2000
x9016
1359D
Yet Another Yet Another Task
data structures
,
dp
,
implementation
,
two pointers
2000
x8868
1200E
Compress Words
brute force
,
hashing
,
implementation
,
string suffix structures
,
strings
2000
x6766
1388D
Captain Flint and Treasure
data structures
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2000
x6083
1391D
505
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
greedy
,
implementation
2000
x4893
1380D
Berserk And Fireball
constructive algorithms
,
greedy
,
implementation
,
math
,
two pointers
2000
x4593
1536D
Omkar and Medians
data structures
,
greedy
,
implementation
2000
x4527
1183E
Subsequences (easy version)
dp
,
graphs
,
implementation
,
shortest paths
2000
x4475
1567D
Expression Evaluation Error
constructive algorithms
,
greedy
,
implementation
,
math
2000
x4369
1804D
Accommodation
brute force
,
dp
,
greedy
,
implementation
2000
x4366
1481D
AB Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2000
x4364
1487E
Cheap Dinner
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
sortings
,
two pointers
2000
x4333
1574D
The Strongest Build
binary search
,
brute force
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
hashing
,
implementation
2000
x4304
1525C
Robot Collisions
data structures
,
greedy
,
implementation
,
sortings
2000
x4295
1349C
Orac and Game of Life
dfs and similar
,
graphs
,
implementation
,
shortest paths
2000
x4207
1408D
Searchlights
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
sortings
,
two pointers
2000
x4126
1783D
Different Arrays
brute force
,
dp
,
implementation
2000
x4115
1514D
Cut and Stick
binary search
,
data structures
,
greedy
,
implementation
,
sortings
2000
x4051
1638D
Big Brush
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x4009
1716C
Robot in a Hallway
data structures
,
dp
,
greedy
,
implementation
,
ternary search
2000
x3976
1618F
Reverse
bitmasks
,
constructive algorithms
,
dfs and similar
,
implementation
,
math
,
strings
2000
x3973
1624E
Masha-forgetful
brute force
,
constructive algorithms
,
dp
,
hashing
,
implementation
,
strings
2000
x3887
1237D
Balanced Playlist
binary search
,
data structures
,
implementation
2000
x3767
1301D
Time to Run
constructive algorithms
,
graphs
,
implementation
2000
x3745
1641B
Repetitions Decoding
constructive algorithms
,
implementation
,
sortings
2000
x3709
1770D
Koxia and Game
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
flows
,
games
,
graph matchings
,
graphs
,
implementation
2000
x3629
1646D
Weight the Tree
constructive algorithms
,
dfs and similar
,
dp
,
implementation
,
trees
2000
x3492
1905D
Cyclic MEX
data structures
,
implementation
,
math
,
two pointers
2000
x3352
1427D
Unshuffling a Deck
constructive algorithms
,
implementation
2000
x3351
1266D
Decreasing Debts
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
two pointers
2000
x3351
1316D
Nash Matrix
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
2000
x3145
1682D
Circular Spanning Tree
constructive algorithms
,
implementation
,
trees
2000
x3144
1685B
Linguistics
greedy
,
implementation
,
sortings
,
strings
2000
x3125
1718B
Fibonacci Strings
greedy
,
implementation
,
math
,
number theory
2000
x2839
374A
Inna and Pink Pony
greedy
,
implementation
2000
x2834
1851G
Vlad and the Mountains
binary search
,
data structures
,
dsu
,
graphs
,
implementation
,
sortings
,
trees
,
two pointers
2000
x2832
1209G1
Into Blocks (easy version)
data structures
,
dsu
,
greedy
,
implementation
,
two pointers
2000
x2816
1815B
Sum Graph
brute force
,
constructive algorithms
,
graphs
,
implementation
,
interactive
,
shortest paths
,
trees
2000
x2801
1088D
Ehab and another another xor problem
bitmasks
,
constructive algorithms
,
implementation
,
interactive
2000
x2735
1943B
Non-Palindromic Substring
hashing
,
implementation
,
math
,
strings
2000
x2718
899E
Segments Removal
data structures
,
dsu
,
flows
,
implementation
,
two pointers
2000
x2701
633D
Fibonacci-ish
brute force
,
dp
,
hashing
,
implementation
,
math
2000
x2551
911E
Stack Sorting
constructive algorithms
,
data structures
,
greedy
,
implementation
2000
x2443
1185E
Polycarp and Snakes
brute force
,
implementation
2000
x2432
1893C
Freedom of Choice
brute force
,
greedy
,
implementation
2000
x2356
1010D
Mars rover
dfs and similar
,
graphs
,
implementation
,
trees
2000
x2300
1248D1
The World Is Just a Programming Task (Easy Version)
brute force
,
dp
,
greedy
,
implementation
2000
x2275
1061D
TV Shows
data structures
,
greedy
,
implementation
,
sortings
2000
x2268
1183G
Candy Box (hard version)
greedy
,
implementation
,
sortings
2000
x2257
1772F
Copy of a Copy of a Copy
constructive algorithms
,
dfs and similar
,
graphs
,
implementation
,
sortings
2000
x2188
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2173
696C
PLEASE
combinatorics
,
dp
,
implementation
,
math
,
matrices
2000
x2037
1165F2
Microtransactions (hard version)
binary search
,
greedy
,
implementation
2000
x2010
509C
Sums of Digits
dp
,
greedy
,
implementation
2000
x1984
358C
Dima and Containers
constructive algorithms
,
greedy
,
implementation
2000
x1934
784E
Twisted Circuit
*special problem
,
brute force
,
implementation
2000
x1851
676D
Theseus and labyrinth
graphs
,
implementation
,
shortest paths
2000
x1821
689E
Mike and Geometry Problem
combinatorics
,
data structures
,
dp
,
geometry
,
implementation
2000
x1792
886D
Restoration of string
constructive algorithms
,
graphs
,
implementation
2000
x1715
75D
Big Maximum Sum
data structures
,
dp
,
greedy
,
implementation
,
math
,
trees
2000
x1711
662D
International Olympiad
constructive algorithms
,
greedy
,
implementation
,
math
2000
x1614
317B
Ants
brute force
,
implementation
2000
x1537
490E
Restoring Increasing Sequence
binary search
,
brute force
,
greedy
,
implementation
2000
x1511
1080D
Olya and magical square
constructive algorithms
,
implementation
,
math
2000
x1502
427E
Police Patrol
greedy
,
implementation
,
math
,
ternary search
2000
x1389
21B
Intersection
implementation
,
math
2000
x1292
818C
Sofa Thief
brute force
,
implementation
2000
x1201
137E
Last Chance
data structures
,
implementation
,
strings
2000
x1176
128D
Numbers
constructive algorithms
,
implementation
2000
x1081
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