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Helvetic Coding Contest 2024 online mirror (teams allowed, unrated)
36:56:49
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strings
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
677C
Vanya and Label
bitmasks
,
combinatorics
,
implementation
,
strings
1500
x6274
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x18072
672B
Different is Good
constructive algorithms
,
implementation
,
strings
1000
x17049
670F
Restore a Number
brute force
,
constructive algorithms
,
strings
2300
x847
670E
Correct Bracket Sequence Editor
data structures
,
dsu
,
strings
1700
x3151
666C
Codeword
combinatorics
,
strings
2500
x765
666A
Reberland Linguistics
dp
,
implementation
,
strings
1800
x3414
665E
Beautiful Subarrays
data structures
,
divide and conquer
,
strings
,
trees
2100
x2869
665C
Simple Strings
dp
,
greedy
,
strings
1300
x9154
653F
Paper task
data structures
,
string suffix structures
,
strings
2600
x949
653B
Bear and Compressing
brute force
,
dfs and similar
,
dp
,
strings
1300
x4880
645E
Intellectual Inquiry
dp
,
greedy
,
strings
2200
x1215
644C
Hostname Aliases
*special problem
,
binary search
,
data structures
,
implementation
,
sortings
,
strings
2100
x908
638B
Making Genome in Berland
*special problem
,
dfs and similar
,
strings
1500
x1926
633C
Spy Syndrome 2
data structures
,
dp
,
hashing
,
implementation
,
sortings
,
string suffix structures
,
strings
1900
x2611
632C
The Smallest String Concatenation
sortings
,
strings
1700
x7205
631D
Messenger
data structures
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x1986
629C
Famil Door and Brackets
dp
,
strings
2000
x2736
628C
Bear and String Distance
greedy
,
strings
1300
x5665
625B
War of the Corporations
constructive algorithms
,
greedy
,
strings
1200
x10059
620F
Xors on Segments
data structures
,
strings
,
trees
2800
x701
616F
Expensive Strings
string suffix structures
,
strings
2700
x550
616A
Comparing Two Long Integers
implementation
,
strings
900
x9523
615C
Running Track
dp
,
greedy
,
strings
,
trees
2000
x2252
613E
Puzzle Lover
dp
,
hashing
,
strings
3200
x453
612A
The Text Splitting
brute force
,
implementation
,
strings
1300
x7013
611D
New Year and Ancient Prophecy
dp
,
hashing
,
strings
2000
x2511
610E
Alphabet Permutations
data structures
,
strings
2500
x791
608B
Hamming Distance Sum
combinatorics
,
strings
1500
x6471
607C
Marbles
hashing
,
strings
2500
x777
601D
Acyclic Organic Compounds
data structures
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2400
x1088
600C
Make Palindrome
constructive algorithms
,
greedy
,
strings
1800
x5635
600A
Extract Numbers
implementation
,
strings
1600
x4857
598B
Queries on a String
implementation
,
strings
1300
x10494
596E
Wilbur and Strings
dfs and similar
,
dp
,
graphs
,
strings
2500
x388
594E
Cutting the Line
string suffix structures
,
strings
3100
x155
591B
Rebranding
implementation
,
strings
1200
x8131
590E
Birthday
graph matchings
,
strings
3200
x744
587F
Duff is Mad
data structures
,
strings
3000
x990
585F
Digits of Number Pi
dp
,
implementation
,
strings
3200
x635
584C
Marina and Vasya
constructive algorithms
,
greedy
,
strings
1700
x6062
580E
Kefa and Watch
data structures
,
hashing
,
strings
2500
x1940
566A
Matching Names
dfs and similar
,
strings
,
trees
2300
x869
559B
Equivalent Strings
divide and conquer
,
hashing
,
sortings
,
strings
1700
x10357
558E
A Simple Task
data structures
,
sortings
,
strings
2300
x5568
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1053
554B
Ohana Cleans Up
brute force
,
greedy
,
strings
1200
x9671
554A
Kyoya and Photobooks
brute force
,
math
,
strings
900
x12714
552E
Vanya and Brackets
brute force
,
dp
,
expression parsing
,
greedy
,
implementation
,
strings
2100
x1409
551B
ZgukistringZ
brute force
,
constructive algorithms
,
implementation
,
strings
1800
x3759
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36220
549A
Face Detection
implementation
,
strings
900
x9345
548A
Mike and Fax
brute force
,
implementation
,
strings
1100
x9831
547E
Mike and Friends
data structures
,
string suffix structures
,
strings
,
trees
2800
x1932
544A
Set of Strings
implementation
,
strings
1100
x7723
535D
Tavas and Malekas
greedy
,
hashing
,
string suffix structures
,
strings
1900
x3722
533F
Encoding
hashing
,
string suffix structures
,
strings
2400
x866
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2170
533B
Work Group
dfs and similar
,
dp
,
graphs
,
strings
,
trees
2000
x2303
526D
Om Nom and Necklace
hashing
,
string suffix structures
,
strings
2200
x2095
525B
Pasha and String
constructive algorithms
,
greedy
,
math
,
strings
1400
x9178
525A
Vitaliy and Pie
greedy
,
hashing
,
strings
1100
x13844
524F
And Yet Another Bracket Sequence
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
2700
x521
520C
DNA Alignment
math
,
strings
1500
x4084
520A
Pangram
implementation
,
strings
800
x89600
518B
Tanya and Postcard
greedy
,
implementation
,
strings
1400
x7798
518A
Vitaly and Strings
constructive algorithms
,
strings
1600
x9106
514C
Watto and Mechanism
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2000
x6454
509E
Pretty Song
math
,
strings
2000
x1769
508B
Anton and currency you all know
greedy
,
math
,
strings
1300
x22051
506E
Mr. Kitayuta's Gift
combinatorics
,
dp
,
matrices
,
strings
3000
x683
505A
Mr. Kitayuta's Gift
brute force
,
implementation
,
strings
1100
x6590
501B
Misha and Changing Handles
data structures
,
dsu
,
strings
1100
x15593
499B
Lecture
implementation
,
strings
1000
x37426
494B
Obsessive String
dp
,
strings
2000
x2570
490C
Hacking Cypher
brute force
,
math
,
number theory
,
strings
1700
x8900
477D
Dreamoon and Binary
dp
,
strings
2700
x499
476E
Dreamoon and Strings
dp
,
strings
2200
x1758
471D
MUH and Cube Walls
string suffix structures
,
strings
1800
x7416
467D
Fedor and Essay
dfs and similar
,
dp
,
graphs
,
hashing
,
strings
2400
x1763
464A
No to Palindromes!
greedy
,
strings
1700
x5811
461E
Appleman and a Game
binary search
,
shortest paths
,
strings
3000
x366
455B
A Lot of Games
dfs and similar
,
dp
,
games
,
implementation
,
strings
,
trees
1900
x5643
452E
Three strings
data structures
,
dsu
,
string suffix structures
,
strings
2400
x1025
452A
Eevee
brute force
,
implementation
,
strings
1000
x7894
448B
Suffix Structures
implementation
,
strings
1400
x15640
444D
DZY Loves Strings
binary search
,
hashing
,
strings
,
two pointers
2500
x753
443B
Kolya and Tandem Repeat
brute force
,
implementation
,
strings
1500
x3964
432D
Prefixes and Suffixes
dp
,
string suffix structures
,
strings
,
two pointers
2000
x8181
427D
Match & Catch
dp
,
string suffix structures
,
strings
2200
x2084
412C
Pattern
implementation
,
strings
1200
x3847
386C
Diverse Substrings
dp
,
strings
,
two pointers
2000
x741
385B
Bear and Strings
brute force
,
greedy
,
implementation
,
math
,
strings
1200
x9518
358B
Dima and Text Messages
brute force
,
strings
1500
x3679
356E
Xenia and String Problem
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
3000
x400
346B
Lucky Common Subsequence
dp
,
strings
2000
x3325
345G
Suffix Subgroup
*special problem
,
strings
2200
x51
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197869
319D
Have You Ever Heard About the Word?
greedy
,
hashing
,
string suffix structures
,
strings
2800
x612
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7370
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