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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
1775E
The Human Equation
greedy
,
implementation
2100
x3023
936B
Sleepy Game
dfs and similar
,
dp
,
games
,
graphs
2100
x3028
1684E
MEX vs DIFF
binary search
,
brute force
,
constructive algorithms
,
data structures
,
greedy
,
two pointers
2100
x3031
1151E
Number of Components
combinatorics
,
data structures
,
dp
,
math
2100
x3038
1934D1
XOR Break --- Solo Version
bitmasks
,
constructive algorithms
,
greedy
2100
x3041
689D
Friends and Subsequences
binary search
,
data structures
2100
x3058
1354E
Graph Coloring
dfs and similar
,
dp
,
graphs
2100
x3061
1856D
More Wrong
divide and conquer
,
interactive
2100
x3073
1838D
Bracket Walk
data structures
,
greedy
,
strings
2100
x3076
1271E
Common Number
binary search
,
combinatorics
,
dp
,
math
2100
x3112
1419E
Decryption
constructive algorithms
,
implementation
,
math
,
number theory
2100
x3137
1790F
Timofey and Black-White Tree
brute force
,
dfs and similar
,
divide and conquer
,
graphs
,
greedy
,
math
,
shortest paths
,
trees
2100
x3144
1637E
Best Pair
binary search
,
brute force
,
implementation
2100
x3182
576C
Points on Plane
constructive algorithms
,
divide and conquer
,
geometry
,
greedy
,
sortings
2100
x3224
1392E
Omkar and Duck
bitmasks
,
constructive algorithms
,
interactive
,
math
2100
x3234
1553E
Permutation Shift
brute force
,
combinatorics
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
math
2100
x3235
985E
Pencils and Boxes
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2100
x3246
1203F1
Complete the Projects (easy version)
greedy
2100
x3255
1762D
GCD Queries
constructive algorithms
,
interactive
,
number theory
2100
x3281
498C
Array and Operations
flows
,
graph matchings
,
number theory
2100
x3292
1025D
Recovering BST
brute force
,
dp
,
math
,
number theory
,
trees
2100
x3296
1886D
Monocarp and the Set
combinatorics
,
data structures
,
math
2100
x3311
1265E
Beautiful Mirrors
data structures
,
dp
,
math
,
probabilities
2100
x3319
703D
Mishka and Interesting sum
data structures
2100
x3325
1606E
Arena
combinatorics
,
dp
,
math
2100
x3336
632D
Longest Subsequence
brute force
,
math
,
number theory
2100
x3375
1446C
Xor Tree
binary search
,
bitmasks
,
data structures
,
divide and conquer
,
dp
,
trees
2100
x3388
675C
Money Transfers
constructive algorithms
,
data structures
,
greedy
,
sortings
2100
x3416
546E
Soldier and Traveling
flows
,
graphs
,
math
2100
x3456
1667B
Optimal Partition
data structures
,
dp
2100
x3467
1332E
Height All the Same
combinatorics
,
constructive algorithms
,
math
,
matrices
2100
x3555
1919D
01 Tree
constructive algorithms
,
data structures
,
dsu
,
greedy
,
sortings
,
trees
2100
x3587
372C
Watching Fireworks is Fun
data structures
,
dp
,
math
2100
x3626
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3631
1299C
Water Balance
data structures
,
geometry
,
greedy
2100
x3638
988E
Divisibility by 25
brute force
,
greedy
2100
x3638
1614D1
Divan and Kostomuksha (easy version)
dp
,
number theory
2100
x3650
1278D
Segment Tree
data structures
,
dsu
,
graphs
,
trees
2100
x3721
734E
Anton and Tree
dfs and similar
,
dp
,
trees
2100
x3732
1393D
Rarity and New Dress
dfs and similar
,
dp
,
implementation
,
shortest paths
2100
x3768
1626D
Martial Arts Tournament
binary search
,
brute force
,
greedy
,
math
2100
x3786
1454F
Array Partition
binary search
,
data structures
,
greedy
,
two pointers
2100
x3794
1363D
Guess The Maximums
binary search
,
implementation
,
interactive
,
math
2100
x3826
543B
Destroying Roads
constructive algorithms
,
graphs
,
shortest paths
2100
x3829
486D
Valid Sets
dfs and similar
,
dp
,
math
,
trees
2100
x3851
1555E
Boring Segments
data structures
,
sortings
,
trees
,
two pointers
2100
x3858
1479B2
Painting the Array II
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
2100
x3903
1000E
We Need More Bosses
dfs and similar
,
graphs
,
trees
2100
x3914
1322B
Present
binary search
,
bitmasks
,
constructive algorithms
,
data structures
,
math
,
sortings
2100
x3937
877D
Olya and Energy Drinks
data structures
,
dfs and similar
,
graphs
,
shortest paths
2100
x3946
1366E
Two Arrays
binary search
,
brute force
,
combinatorics
,
constructive algorithms
,
dp
,
two pointers
2100
x3958
1621D
The Winter Hike
constructive algorithms
,
greedy
,
math
2100
x3960
1117D
Magic Gems
dp
,
math
,
matrices
2100
x4007
1364D
Ehab's Last Corollary
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2100
x4012
1389D
Segment Intersections
brute force
,
greedy
,
implementation
,
math
2100
x4021
1516D
Cut
binary search
,
data structures
,
dp
,
graphs
,
number theory
,
two pointers
2100
x4087
1433G
Reducing Delivery Cost
brute force
,
graphs
,
shortest paths
2100
x4103
1418D
Trash Problem
data structures
,
implementation
2100
x4175
1560F2
Nearest Beautiful Number (hard version)
bitmasks
,
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
2100
x4191
1409F
Subsequences of Length Two
dp
,
strings
2100
x4266
1360H
Binary Median
binary search
,
bitmasks
,
brute force
,
constructive algorithms
2100
x4282
1365F
Swaps Again
constructive algorithms
,
implementation
,
sortings
2100
x4304
1538G
Gift Set
binary search
,
greedy
,
math
,
ternary search
2100
x4354
1472G
Moving to the Capital
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x4396
1420C2
Pokémon Army (hard version)
data structures
,
divide and conquer
,
dp
,
greedy
,
implementation
2100
x4493
1370E
Binary Subsequence Rotation
binary search
,
constructive algorithms
,
data structures
,
greedy
2100
x4609
1006F
Xor-Paths
bitmasks
,
brute force
,
dp
,
meet-in-the-middle
2100
x4647
1355E
Restorer Distance
binary search
,
greedy
,
math
,
sortings
,
ternary search
2100
x4712
1207F
Remainder Problem
brute force
,
data structures
,
implementation
2100
x4720
319C
Kalila and Dimna in the Logging Industry
dp
,
geometry
2100
x4726
1493D
GCD of an Array
brute force
,
data structures
,
hashing
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2100
x4736
837D
Round Subset
dp
,
math
2100
x4796
1343E
Weights Distributing
brute force
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x4806
1217D
Coloring Edges
constructive algorithms
,
dfs and similar
,
graphs
2100
x4939
796D
Police Stations
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
2100
x5122
455C
Civilization
dfs and similar
,
dp
,
dsu
,
ternary search
,
trees
2100
x5126
620E
New Year Tree
bitmasks
,
data structures
,
trees
2100
x5183
1372D
Omkar and Circle
brute force
,
dp
,
games
,
greedy
2100
x5286
1450C1
Errich-Tac-Toe (Easy Version)
constructive algorithms
,
math
2100
x5303
1C
Ancient Berland Circus
geometry
,
math
2100
x5375
343D
Water Tree
data structures
,
dfs and similar
,
graphs
,
trees
2100
x5449
1499D
The Number of Pairs
dp
,
math
,
number theory
2100
x5451
1312E
Array Shrinking
dp
,
greedy
2100
x5510
920E
Connected Components?
data structures
,
dfs and similar
,
dsu
,
graphs
2100
x5786
1433F
Zero Remainder Sum
dp
2100
x5829
208E
Blood Cousins
binary search
,
data structures
,
dfs and similar
,
trees
2100
x6068
519E
A and B and Lecture Rooms
binary search
,
data structures
,
dfs and similar
,
dp
,
trees
2100
x6179
1486D
Max Median
binary search
,
data structures
,
dp
2100
x6706
321C
Ciel the Commander
constructive algorithms
,
dfs and similar
,
divide and conquer
,
greedy
,
trees
2100
x6770
484B
Maximum Value
binary search
,
math
,
sortings
,
two pointers
2100
x6774
609E
Minimum spanning tree for each edge
data structures
,
dfs and similar
,
dsu
,
graphs
,
trees
2100
x6930
1187E
Tree Painting
dfs and similar
,
dp
,
trees
2100
x7430
474F
Ant colony
data structures
,
math
,
number theory
2100
x7672
162G
Non-decimal sum
*special problem
2000
x55
162I
Truncatable primes
*special problem
2000
x71
153D
Date Change
*special problem
2000
x77
661E
Divisibility Check
*special problem
2000
x78
207D2
The Beaver's Problem - 3
2000
x102
345C
Counting Fridays
*special problem
2000
x121
661C
Array Sum
*special problem
2000
x126
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