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Helvetic Coding Contest 2024 online mirror (teams allowed, unrated)
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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
1948D
Tandem Repeats?
brute force
,
strings
,
two pointers
1700
x8076
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x14193
1948B
Array Fix
brute force
,
dp
,
greedy
,
implementation
1100
x20251
1948A
Special Characters
brute force
,
constructive algorithms
800
x26062
1946F
Nobody is needed
2-sat
,
data structures
,
dfs and similar
,
dp
2500
x755
1946E
Girl Permutation
combinatorics
,
dp
,
math
,
number theory
2200
x2049
1946D
Birthday Gift
bitmasks
,
brute force
,
constructive algorithms
,
greedy
,
implementation
1900
x3940
1946C
Tree Cutting
binary search
,
dp
,
greedy
,
implementation
,
trees
1600
x8922
1946B
Maximum Sum
dp
,
greedy
,
math
1100
x17634
1946A
Median of an Array
greedy
,
implementation
,
sortings
800
x23254
1945H
GCD is Greater
brute force
,
data structures
,
math
,
number theory
2600
x470
1945G
Cook and Porridge
binary search
,
constructive algorithms
,
data structures
,
implementation
2500
x613
1945F
Kirill and Mushrooms
data structures
,
sortings
1900
x3513
1945E
Binary Search
binary search
,
constructive algorithms
,
greedy
1700
x6831
1945D
Seraphim the Owl
dp
,
greedy
1300
x11906
1945C
Left and Right Houses
brute force
1200
x12583
1945B
Fireworks
math
,
number theory
900
x19348
1945A
Setting up Camp
greedy
,
math
800
x24370
1944B
Equal XOR
bitmasks
,
constructive algorithms
1100
x14024
1944A
Destroying Bridges
graphs
,
greedy
,
math
800
x20911
1943F
Minimum Hamming Distance
dp
3500
x73
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x212
1943E1
MEX Game 2 (Easy Version)
binary search
,
brute force
,
greedy
2900
x341
1943D2
Counting Is Fun (Hard Version)
combinatorics
,
dp
2800
x569
1943D1
Counting Is Fun (Easy Version)
brute force
,
combinatorics
,
dp
,
math
2400
x1208
1943C
Tree Compass
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2300
x1745
1943B
Non-Palindromic Substring
hashing
,
implementation
,
math
,
strings
2000
x3183
1943A
MEX Game 1
games
,
greedy
1300
x15007
1942H
Farmer John's Favorite Intern
data structures
,
dp
,
flows
,
trees
3500
x57
1942G
Bessie and Cards
combinatorics
,
dp
,
math
2800
x359
1942F
Farmer John's Favorite Function
brute force
,
data structures
,
implementation
,
math
2700
x547
1942E
Farm Game
combinatorics
,
games
2300
x1415
1942D
Learning to Paint
binary search
,
data structures
,
dfs and similar
,
dp
,
greedy
,
implementation
,
sortings
2100
x2379
1942C2
Bessie's Birthday Cake (Hard Version)
geometry
,
greedy
,
math
1700
x5409
1942C1
Bessie's Birthday Cake (Easy Version)
geometry
,
greedy
,
math
1300
x9357
1942B
Bessie and MEX
constructive algorithms
,
math
1100
x12093
1942A
Farmer John's Challenge
constructive algorithms
,
math
800
x15409
1941G
Rudolf and Subway
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2000
x2900
1941F
Rudolf and Imbalance
binary search
,
greedy
,
sortings
,
two pointers
1800
x5114
1941E
Rudolf and k Bridges
binary search
,
data structures
,
dp
,
two pointers
1600
x8049
1941D
Rudolf and the Ball Game
dfs and similar
,
dp
,
implementation
1200
x16414
1941C
Rudolf and the Ugly String
dp
,
greedy
,
strings
900
x29412
1941B
Rudolf and 121
brute force
,
dp
,
greedy
,
math
1000
x26186
1941A
Rudolf and the Ticket
brute force
,
math
800
x38622
1940D
Almost Certainly
*special problem
,
constructive algorithms
,
data structures
,
sortings
x123
1940C
Burenka and Pether
*special problem
,
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
graphs
,
sortings
,
trees
x32
1940B
Three Arrays
*special problem
,
constructive algorithms
,
implementation
,
sortings
x173
1940A
Parallel Universes
*special problem
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
x78
1939D
Big Persimmon
*special problem
,
dp
,
games
x59
1939C
More Gifts
*special problem
,
dfs and similar
,
two pointers
x272
1939B
Evidence Board
*special problem
,
constructive algorithms
,
dfs and similar
,
graphs
,
trees
x208
1939A
Draw Polygon Lines
*special problem
,
constructive algorithms
,
dp
,
geometry
,
interactive
x14
1938M
Zig-zag
3500
x44
1938L
XOR Operations
2800
x245
1938K
Tree Quiz
2400
x527
1938J
There and Back Again
2100
x1103
1938I
Symmetric Boundary
2800
x52
1938H
Pho Restaurant
1600
x1845
1938G
Personality Test
2300
x861
1938F
Forming Groups
2400
x632
1938E
Duplicates
2200
x848
1938D
Bánh Bò
3300
x77
1938C
Bit Counting Sequence
1900
x1240
1938B
Attraction Score
3000
x146
1938A
Antiparticle Antiphysics
3500
x36
1937B
Binary Path
dp
,
greedy
,
implementation
1300
x12955
1937A
Shuffle Party
implementation
,
math
800
x21320
1936F
Grand Finale: Circles
binary search
,
geometry
3300
x66
1936E
Yet Yet Another Permutation Problem
divide and conquer
,
fft
,
math
3400
x94
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x408
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1063
1936B
Pinball
binary search
,
data structures
,
implementation
,
math
,
two pointers
2000
x2392
1936A
Bitwise Operation Wizard
bitmasks
,
constructive algorithms
,
greedy
,
interactive
,
math
1700
x6504
1935F
Andrey's Tree
binary search
,
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
greedy
,
implementation
,
trees
2800
x387
1935E
Distance Learning Courses in MAC
bitmasks
,
brute force
,
data structures
,
greedy
,
math
2400
x1156
1935D
Exam in MAC
binary search
,
combinatorics
,
implementation
,
math
1800
x7257
1935C
Messenger in MAC
binary search
,
brute force
,
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1800
x7057
1935B
Informatics in MAC
constructive algorithms
1200
x16290
1935A
Entertainment in MAC
constructive algorithms
,
strings
800
x25303
1934E
Weird LCM Operations
brute force
,
constructive algorithms
,
number theory
3000
x182
1934D2
XOR Break --- Game Version
bitmasks
,
games
,
greedy
,
interactive
2400
x1175
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x3038
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x5994
1934B
Yet Another Coin Problem
brute force
,
dp
,
greedy
,
math
1200
x16490
1934A
Too Min Too Max
greedy
,
math
800
x23217
1933G
Turtle Magic: Royal Turtle Shell Pattern
bitmasks
,
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
math
2300
x855
1933F
Turtle Mission: Robot and the Earthquake
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2182
1933E
Turtle vs. Rabbit Race: Optimal Trainings
binary search
,
implementation
,
math
,
ternary search
1500
x9608
1933D
Turtle Tenacity: Continual Mods
constructive algorithms
,
greedy
,
math
,
number theory
,
sortings
1200
x17611
1933C
Turtle Fingers: Count the Values of k
brute force
,
implementation
,
math
,
number theory
1100
x20326
1933B
Turtle Math: Fast Three Task
implementation
,
math
,
number theory
800
x29710
1933A
Turtle Puzzle: Rearrange and Negate
greedy
,
math
,
sortings
800
x35207
1932G
Moving Platforms
graphs
,
math
,
number theory
,
shortest paths
2300
x867
1932F
Feed Cats
data structures
,
dp
,
sortings
1900
x3344
1932E
Final Countdown
implementation
,
math
,
number theory
1600
x6708
1932D
Card Game
greedy
,
implementation
1400
x9799
1932C
LR-remainders
brute force
,
data structures
,
implementation
,
math
,
two pointers
1400
x13524
1932B
Chaya Calendar
number theory
1100
x18242
1932A
Thorns and Coins
dp
,
greedy
,
implementation
800
x26467
1931G
One-Dimensional Puzzle
combinatorics
,
math
,
number theory
2000
x2424
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