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Helvetic Coding Contest 2024 online mirror (teams allowed, unrated)
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combine-tags-by-or
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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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Custom test
Problems
#
Name
259B
Little Elephant and Magic Square
brute force
,
implementation
1100
x13675
259A
Little Elephant and Chess
brute force
,
strings
1000
x8925
258E
Little Elephant and Tree
data structures
,
dfs and similar
,
trees
2400
x1026
258D
Little Elephant and Broken Sorting
dp
,
math
,
probabilities
2600
x1210
258C
Little Elephant and LCM
binary search
,
combinatorics
,
dp
,
math
2000
x1754
258B
Little Elephant and Elections
brute force
,
combinatorics
,
dp
1900
x1418
258A
Little Elephant and Bits
greedy
,
math
1100
x22017
257E
Greedy Elevator
data structures
,
implementation
2200
x275
257D
Sum
greedy
,
math
1900
x1543
257C
View Angle
brute force
,
geometry
,
math
1800
x4186
257B
Playing Cubes
games
,
greedy
,
implementation
1300
x6857
257A
Sockets
greedy
,
implementation
,
sortings
1100
x6378
256E
Lucky Arrays
data structures
2400
x653
256D
Liars and Serge
dp
2700
x255
255E
Furlo and Rublo and Game
games
,
implementation
,
math
2200
x831
255D
Mr. Bender and Square
binary search
,
implementation
,
math
1800
x1930
255C
Almost Arithmetical Progression
brute force
,
dp
1500
x4617
255B
Code Parsing
implementation
1200
x4865
255A
Greg's Workout
implementation
800
x27656
254E
Dormitory
dp
,
implementation
2100
x484
254D
Rats
brute force
,
dfs and similar
,
graphs
,
implementation
,
shortest paths
2300
x497
254C
Anagram
greedy
,
strings
1800
x1468
254B
Jury Size
brute force
,
implementation
1500
x2127
254A
Cards with Numbers
constructive algorithms
,
sortings
1200
x6836
253E
Printer
binary search
,
data structures
,
implementation
,
sortings
2200
x520
253D
Table with Letters - 2
brute force
,
two pointers
2000
x805
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x2520
253B
Physics Practical
binary search
,
dp
,
sortings
,
two pointers
1400
x10305
253A
Boys and Girls
greedy
1100
x10925
252B
Unsorting Array
brute force
,
sortings
1800
x1678
252A
Little Xor
brute force
,
implementation
1100
x5160
251E
Tree and Table
dfs and similar
,
dp
,
implementation
,
trees
3000
x168
251D
Two Sets
bitmasks
,
math
2700
x441
251C
Number Transformation
dp
,
greedy
,
number theory
2000
x1011
251B
Playing with Permutations
implementation
,
math
1800
x1249
251A
Points on Line
binary search
,
combinatorics
,
two pointers
1300
x16565
250E
Mad Joe
brute force
2000
x438
250D
Building Bridge
geometry
,
ternary search
,
two pointers
1900
x873
250C
Movie Critics
greedy
1600
x1875
250B
Restoring IPv6
implementation
,
strings
1500
x1945
250A
Paper Work
greedy
1000
x3983
249E
Endless Matrix
math
2600
x287
249D
Donkey and Stars
data structures
,
dp
,
geometry
,
math
,
sortings
2700
x374
248E
Piglet's Birthday
dp
,
math
,
probabilities
2600
x559
248D
Sweets for Everyone!
binary search
,
greedy
,
implementation
2300
x476
248C
Robo-Footballer
binary search
,
geometry
2000
x793
248B
Chilly Willy
math
,
number theory
1400
x5187
248A
Cupboards
implementation
800
x21369
246E
Blood Cousins Return
binary search
,
data structures
,
dfs and similar
,
dp
,
sortings
2400
x2956
246D
Colorful Graph
brute force
,
dfs and similar
,
graphs
1600
x9186
246C
Beauty Pageant
brute force
,
constructive algorithms
,
greedy
1600
x2601
246B
Increase and Decrease
greedy
,
math
1300
x10917
246A
Buggy Sorting
constructive algorithms
,
greedy
,
sortings
900
x9041
245H
Queries for Number of Palindromes
dp
,
hashing
,
strings
1800
x5947
245G
Suggested Friends
brute force
,
graphs
2200
x423
245F
Log Stream Analysis
binary search
,
brute force
,
implementation
,
strings
2000
x859
245E
Mishap in Club
greedy
,
implementation
1400
x3221
245D
Restoring Table
constructive algorithms
,
greedy
1500
x2220
245C
Game with Coins
greedy
1700
x1510
245B
Internet Address
implementation
,
strings
1100
x5122
245A
System Administrator
implementation
800
x8282
244B
Undoubtedly Lucky Numbers
bitmasks
,
brute force
,
dfs and similar
1600
x4368
244A
Dividing Orange
implementation
900
x7738
243E
Matrix
data structures
3000
x171
243D
Cubes
data structures
,
dp
,
geometry
,
two pointers
2700
x208
243C
Colorado Potato Beetle
dfs and similar
,
implementation
2200
x519
243B
Hydra
graphs
,
sortings
2000
x1176
243A
The Brand New Function
bitmasks
1600
x3782
242E
XOR on Segment
bitmasks
,
data structures
2000
x8394
242D
Dispute
dfs and similar
,
graphs
,
greedy
2100
x1805
242C
King's Path
dfs and similar
,
graphs
,
hashing
,
shortest paths
1800
x8011
242B
Big Segment
implementation
,
sortings
1100
x15194
242A
Heads or Tails
brute force
,
implementation
1100
x6232
241G
Challenging Balloons
constructive algorithms
1900
x533
241F
Race
brute force
,
implementation
2300
x259
241E
Flights
graphs
,
shortest paths
2600
x994
241D
Numbers
2900
x346
241C
Mirror Box
geometry
,
implementation
2000
x507
241B
Friends
binary search
,
bitmasks
,
data structures
,
math
2700
x751
241A
Old Peykan
greedy
1300
x2202
240F
TorCoder
data structures
2600
x1778
240E
Road Repairs
dfs and similar
,
graphs
,
greedy
2800
x347
239B
Easy Tape Programming
brute force
,
implementation
1500
x1358
239A
Two Bags of Potatoes
greedy
,
implementation
,
math
1200
x18101
238E
Meeting Her
dp
,
graphs
,
shortest paths
2600
x338
238D
Tape Programming
data structures
,
implementation
2900
x244
238C
World Eater Brothers
dfs and similar
,
dp
,
greedy
,
trees
2100
x1018
238B
Boring Partition
constructive algorithms
1800
x1265
238A
Not Wool Sequences
constructive algorithms
,
math
1300
x2005
237E
Build String
flows
,
graphs
2000
x1586
237D
T-decomposition
dfs and similar
,
graphs
,
greedy
,
trees
2000
x542
237C
Primes on Interval
binary search
,
number theory
,
two pointers
1600
x5554
237B
Young Table
implementation
,
sortings
1500
x2220
237A
Free Cash
implementation
1000
x25754
236B
Easy Number Challenge
implementation
,
number theory
1300
x13452
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x192858
235E
Number Challenge
combinatorics
,
dp
,
implementation
,
math
,
number theory
2600
x741
235D
Graph Game
graphs
3000
x474
235C
Cyclical Quest
data structures
,
string suffix structures
,
strings
2700
x1999
235B
Let's Play Osu!
dp
,
math
,
probabilities
2000
x3329
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