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Helvetic Coding Contest 2024 online mirror (teams allowed, unrated)
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brute force
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
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implementation
interactive
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matrices
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probabilities
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Problems
#
Name
1615C
Menorah
brute force
,
graphs
,
greedy
,
math
1600
x8036
1967B1
Reverse Card (Easy Version)
brute force
,
math
,
number theory
x8086
1948D
Tandem Repeats?
brute force
,
strings
,
two pointers
1700
x8090
1677A
Tokitsukaze and Strange Inequality
brute force
,
data structures
,
dp
1600
x8104
1660D
Maximum Product Strikes Back
brute force
,
implementation
,
math
,
two pointers
1600
x8122
940A
Points on the line
brute force
,
greedy
,
sortings
1200
x8138
997A
Convert to Ones
brute force
,
greedy
,
implementation
,
math
1500
x8162
475B
Strongly Connected City
brute force
,
dfs and similar
,
graphs
,
implementation
1400
x8226
1732D1
Balance (Easy version)
brute force
,
data structures
,
implementation
,
number theory
1500
x8243
1770C
Koxia and Number Theory
brute force
,
chinese remainder theorem
,
math
,
number theory
1700
x8254
798B
Mike and strings
brute force
,
dp
,
strings
1300
x8263
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x8267
922B
Magic Forest
brute force
1300
x8289
1290A
Mind Control
brute force
,
data structures
,
implementation
1600
x8305
1130C
Connect
brute force
,
dfs and similar
,
dsu
1400
x8311
855B
Marvolo Gaunt's Ring
brute force
,
data structures
,
dp
1500
x8352
602A
Two Bases
brute force
,
implementation
1100
x8360
978D
Almost Arithmetic Progression
brute force
,
implementation
,
math
1500
x8363
749B
Parallelogram is Back
brute force
,
constructive algorithms
,
geometry
1200
x8366
46A
Ball Game
brute force
,
implementation
800
x8377
1968D
Permutation Game
brute force
,
dfs and similar
,
games
,
graphs
,
math
x8447
916A
Jamie and Alarm Snooze
brute force
,
implementation
,
math
900
x8472
195A
Let's Watch Football
binary search
,
brute force
,
math
1000
x8475
868A
Bark to Unlock
brute force
,
implementation
,
strings
900
x8513
1023A
Single Wildcard Pattern Matching
brute force
,
implementation
,
strings
1200
x8514
1826D
Running Miles
brute force
,
dp
,
greedy
1700
x8517
710B
Optimal Point on a Line
brute force
,
sortings
1400
x8517
416B
Art Union
brute force
,
dp
,
implementation
1300
x8517
1572A
Book
binary search
,
brute force
,
data structures
,
dp
,
graphs
,
implementation
,
sortings
1800
x8521
1500A
Going Home
brute force
,
hashing
,
implementation
,
math
1800
x8535
1523C
Compression and Expansion
brute force
,
data structures
,
greedy
,
implementation
,
trees
1600
x8581
1714D
Color with Occurrences
brute force
,
data structures
,
dp
,
greedy
,
strings
1600
x8588
1786B
Cake Assembly Line
brute force
,
sortings
1300
x8608
1121B
Mike and Children
brute force
,
implementation
1200
x8614
1311D
Three Integers
brute force
,
math
2000
x8636
1225C
p-binary
bitmasks
,
brute force
,
math
1600
x8640
344B
Simple Molecules
brute force
,
graphs
,
math
1200
x8653
409H
A + B Strikes Back
*special problem
,
brute force
,
constructive algorithms
,
dsu
,
implementation
1500
x8678
289A
Polo the Penguin and Segments
brute force
,
implementation
1100
x8690
1214A
Optimal Currency Exchange
brute force
,
math
1400
x8699
1375D
Replace by MEX
brute force
,
constructive algorithms
,
sortings
1900
x8720
938B
Run For Your Prize
brute force
,
greedy
1100
x8734
1907E
Good Triples
brute force
,
combinatorics
,
number theory
1600
x8747
681B
Economy Game
brute force
1300
x8764
740A
Alyona and copybooks
brute force
,
implementation
1300
x8810
584D
Dima and Lisa
brute force
,
math
,
number theory
1800
x8815
919C
Seat Arrangements
brute force
,
implementation
1300
x8818
300C
Beautiful Numbers
brute force
,
combinatorics
1800
x8851
1921E
Eat the Chip
brute force
,
games
,
greedy
,
math
1600
x8866
864B
Polycarp and Letters
brute force
,
implementation
,
strings
1000
x8871
1269B
Modulo Equality
brute force
,
sortings
1500
x8889
816A
Karen and Morning
brute force
,
implementation
1000
x8889
1461D
Divide and Summarize
binary search
,
brute force
,
data structures
,
divide and conquer
,
implementation
,
sortings
1600
x8893
218A
Mountain Scenery
brute force
,
constructive algorithms
,
implementation
1100
x8893
490C
Hacking Cypher
brute force
,
math
,
number theory
,
strings
1700
x8901
1731C
Even Subarrays
bitmasks
,
brute force
,
hashing
,
math
,
number theory
1700
x8917
259A
Little Elephant and Chess
brute force
,
strings
1000
x8925
704A
Thor
brute force
,
data structures
,
implementation
1600
x8932
982A
Row
brute force
,
constructive algorithms
1200
x8938
742B
Arpa’s obvious problem and Mehrdad’s terrible solution
brute force
,
math
,
number theory
1500
x9025
981A
Antipalindrome
brute force
,
implementation
,
strings
900
x9030
1482C
Basic Diplomacy
brute force
,
constructive algorithms
,
greedy
,
implementation
1600
x9081
463A
Caisa and Sugar
brute force
,
implementation
1200
x9097
631A
Interview
brute force
,
implementation
900
x9127
1051C
Vasya and Multisets
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9131
347B
Fixed Points
brute force
,
implementation
,
math
1100
x9139
1469D
Ceil Divisions
brute force
,
constructive algorithms
,
math
,
number theory
1700
x9141
909A
Generate Login
brute force
,
greedy
,
sortings
1000
x9147
1498C
Planar Reflections
brute force
,
data structures
,
dp
1600
x9164
1287B
Hyperset
brute force
,
data structures
,
implementation
1500
x9175
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9190
1198B
Welfare State
binary search
,
brute force
,
data structures
,
sortings
1600
x9194
1016B
Segment Occurrences
brute force
,
implementation
1300
x9238
1140C
Playlist
brute force
,
data structures
,
sortings
1600
x9250
1681D
Required Length
brute force
,
dfs and similar
,
dp
,
hashing
,
shortest paths
1700
x9259
898B
Proper Nutrition
brute force
,
implementation
,
number theory
1100
x9259
822B
Crossword solving
brute force
,
implementation
,
strings
1000
x9317
1917C
Watering an Array
brute force
,
greedy
,
implementation
,
math
1600
x9348
869A
The Artful Expedient
brute force
,
implementation
1100
x9358
385C
Bear and Prime Numbers
binary search
,
brute force
,
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x9371
1191B
Tokitsukaze and Mahjong
brute force
,
implementation
1200
x9413
875A
Classroom Watch
brute force
,
math
1200
x9490
1321C
Remove Adjacent
brute force
,
constructive algorithms
,
greedy
,
strings
1600
x9502
1814B
Long Legs
brute force
,
math
1700
x9504
1765E
Exchange
brute force
,
math
1000
x9508
1485C
Floor and Mod
binary search
,
brute force
,
math
,
number theory
1700
x9512
385B
Bear and Strings
brute force
,
greedy
,
implementation
,
math
,
strings
1200
x9522
891A
Pride
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x9596
1659C
Line Empire
binary search
,
brute force
,
dp
,
greedy
,
implementation
,
math
1500
x9638
554B
Ohana Cleans Up
brute force
,
greedy
,
strings
1200
x9674
611B
New Year and Old Property
bitmasks
,
brute force
,
implementation
1300
x9767
1400D
Zigzags
brute force
,
combinatorics
,
data structures
,
math
,
two pointers
1900
x9789
1105B
Zuhair and Strings
brute force
,
implementation
,
strings
1100
x9792
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x9803
1011B
Planning The Expedition
binary search
,
brute force
,
implementation
1200
x9804
1742G
Orray
bitmasks
,
brute force
,
greedy
,
math
,
sortings
1500
x9811
548A
Mike and Fax
brute force
,
implementation
,
strings
1100
x9832
1759E
The Humanoid
brute force
,
dp
,
sortings
1500
x9908
1550C
Manhattan Subarrays
brute force
,
geometry
,
greedy
,
implementation
1700
x9929
870A
Search for Pretty Integers
brute force
,
implementation
900
x9944
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