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Helvetic Coding Contest 2024 online mirror (teams allowed, unrated)
20:08:26
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shortest paths
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
1621H
Trains and Airplanes
dfs and similar
,
graphs
,
shortest paths
,
trees
3500
x162
1580E
Railway Construction
brute force
,
constructive algorithms
,
data structures
,
graphs
,
shortest paths
3400
x64
936E
Iqea
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
shortest paths
,
trees
3400
x182
843D
Dynamic Shortest Path
graphs
,
shortest paths
3400
x752
986F
Oppa Funcan Style Remastered
graphs
,
math
,
number theory
,
shortest paths
3300
x564
1859F
Teleportation in Byteland
data structures
,
dfs and similar
,
divide and conquer
,
graphs
,
shortest paths
,
trees
3200
x365
827F
Dirty Arkady's Kitchen
data structures
,
dp
,
graphs
,
shortest paths
3200
x385
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x126
317E
Princess and Her Shadow
constructive algorithms
,
shortest paths
3100
x152
1566G
Four Vertices
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
3100
x327
1307G
Cow and Exercise
flows
,
graphs
,
shortest paths
3100
x478
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x64
1218G
Alpha planetary system
constructive algorithms
,
graphs
,
shortest paths
3000
x87
1201E2
Knightmare (hard)
graphs
,
interactive
,
shortest paths
3000
x140
57E
Chess
math
,
shortest paths
3000
x249
1779G
The Game of the Century
constructive algorithms
,
graphs
,
shortest paths
3000
x301
1615H
Reindeer Games
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
flows
,
graphs
,
shortest paths
3000
x308
461E
Appleman and a Game
binary search
,
shortest paths
,
strings
3000
x366
1558E
Down Below
binary search
,
dfs and similar
,
graphs
,
greedy
,
meet-in-the-middle
,
shortest paths
3000
x434
1320E
Treeland and Viruses
data structures
,
dfs and similar
,
dp
,
shortest paths
,
trees
3000
x631
1163F
Indecisive Taxi Fee
data structures
,
graphs
,
shortest paths
3000
x818
464E
The Classic Problem
data structures
,
graphs
,
shortest paths
3000
x1302
1387C
Viruses
*special problem
,
dp
,
shortest paths
,
string suffix structures
2900
x122
1201E1
Knightmare (easy)
graphs
,
interactive
,
shortest paths
2900
x125
1726F
Late For Work (submissions are not allowed)
data structures
,
greedy
,
schedules
,
shortest paths
2900
x131
1654G
Snowy Mountain
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
2900
x355
1487F
Ones
dp
,
greedy
,
shortest paths
2900
x360
1392G
Omkar and Pies
bitmasks
,
dfs and similar
,
dp
,
math
,
shortest paths
2900
x442
763D
Timofey and a flat tree
data structures
,
graphs
,
hashing
,
shortest paths
,
trees
2900
x514
1765I
Infinite Chess
implementation
,
shortest paths
2800
x181
1578A
Anti-Tetris
constructive algorithms
,
graphs
,
shortest paths
2800
x328
1612F
Armor and Weapons
brute force
,
dp
,
greedy
,
shortest paths
2800
x560
360E
Levko and Game
graphs
,
greedy
,
shortest paths
2800
x674
1648D
Serious Business
data structures
,
divide and conquer
,
dp
,
implementation
,
shortest paths
2800
x790
79D
Password
bitmasks
,
dp
,
shortest paths
2800
x943
757F
Team Rocket Rises Again
data structures
,
graphs
,
shortest paths
2800
x1065
1184B3
The Doctor Meets Vader (Hard)
flows
,
shortest paths
2700
x166
1599G
Shortest path
brute force
,
geometry
,
math
,
shortest paths
2700
x357
1140G
Double Tree
data structures
,
divide and conquer
,
shortest paths
,
trees
2700
x461
1627F
Not Splitting
geometry
,
graphs
,
greedy
,
implementation
,
shortest paths
2700
x553
773D
Perishable Roads
dp
,
graphs
,
shortest paths
2700
x564
1550F
Jumping Around
binary search
,
data structures
,
divide and conquer
,
dp
,
dsu
,
graphs
,
shortest paths
2700
x627
1617E
Christmas Chocolates
dfs and similar
,
dp
,
games
,
graphs
,
implementation
,
math
,
number theory
,
shortest paths
,
trees
2700
x831
1804F
Approximate Diameter
binary search
,
divide and conquer
,
graphs
,
shortest paths
2700
x849
1632E2
Distance Tree (hard version)
binary search
,
dfs and similar
,
shortest paths
,
trees
2700
x926
1450E
Capitalism
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2700
x1017
1370F2
The Hidden Pair (Hard Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2700
x1241
605E
Intergalaxy Trips
probabilities
,
shortest paths
2700
x1317
232C
Doe Graphs
constructive algorithms
,
divide and conquer
,
dp
,
graphs
,
shortest paths
2600
x279
919F
A Game With Numbers
games
,
graphs
,
shortest paths
2600
x321
325C
Monsters and Diamonds
dfs and similar
,
graphs
,
shortest paths
2600
x331
238E
Meeting Her
dp
,
graphs
,
shortest paths
2600
x338
375C
Circling Round Treasures
bitmasks
,
shortest paths
2600
x473
37E
Trial for Chief
graphs
,
greedy
,
shortest paths
2600
x578
814E
An unavoidable detour for home
combinatorics
,
dp
,
graphs
,
shortest paths
2600
x640
346D
Robot Control
dp
,
graphs
,
shortest paths
2600
x683
1681E
Labyrinth Adventures
data structures
,
dp
,
matrices
,
shortest paths
2600
x698
1898F
Vova Escapes the Matrix
brute force
,
dfs and similar
,
divide and conquer
,
shortest paths
2600
x734
542E
Playing on Graph
graphs
,
shortest paths
2600
x807
196E
Opening Portals
dsu
,
graphs
,
shortest paths
2600
x829
241E
Flights
graphs
,
shortest paths
2600
x994
1301F
Super Jaber
dfs and similar
,
graphs
,
implementation
,
shortest paths
2600
x1056
1209F
Koala and Notebook
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
strings
,
trees
2600
x1070
1495D
BFS Trees
combinatorics
,
dfs and similar
,
graphs
,
math
,
shortest paths
,
trees
2600
x1190
1325E
Ehab's REAL Number Theory Problem
brute force
,
dfs and similar
,
graphs
,
number theory
,
shortest paths
2600
x1829
311C
Fetch the Treasure
brute force
,
data structures
,
graphs
,
shortest paths
2500
x475
1776J
Italian Data Centers
graphs
,
shortest paths
2500
x608
1920F1
Smooth Sailing (Easy Version)
binary search
,
brute force
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
shortest paths
2500
x869
1842F
Tenzing and Tree
dfs and similar
,
greedy
,
shortest paths
,
sortings
,
trees
2500
x1239
1528D
It's a bird! No, it's a plane! No, it's AaParsa!
constructive algorithms
,
graphs
,
shortest paths
2500
x1381
416E
President's Path
dp
,
graphs
,
shortest paths
2500
x1387
1253F
Cheap Robot
binary search
,
dsu
,
graphs
,
shortest paths
,
trees
2500
x1576
1407E
Egor in the Republic of Dagestan
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
2500
x1600
1043F
Make It One
bitmasks
,
combinatorics
,
dp
,
math
,
number theory
,
shortest paths
2500
x2185
75E
Ship's Shortest Path
geometry
,
shortest paths
2400
x270
97C
Winning Strategy
binary search
,
graphs
,
math
,
shortest paths
2400
x296
83C
Track
graphs
,
greedy
,
shortest paths
2400
x401
266D
BerDonalds
graphs
,
math
,
shortest paths
2400
x709
913E
Logical Expression
bitmasks
,
dp
,
shortest paths
2400
x743
983C
Elevator
dp
,
graphs
,
shortest paths
2400
x801
755E
PolandBall and White-Red graph
constructive algorithms
,
graphs
,
shortest paths
2400
x810
29E
Quarrel
graphs
,
shortest paths
2400
x859
1004E
Sonya and Ice Cream
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
trees
2400
x1008
1874B
Jellyfish and Math
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x1060
1936C
Pokémon Arena
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
2400
x1065
1632E1
Distance Tree (easy version)
binary search
,
data structures
,
dfs and similar
,
graphs
,
shortest paths
,
trees
2400
x1108
1738F
Connectivity Addicts
constructive algorithms
,
dsu
,
graphs
,
greedy
,
interactive
,
shortest paths
,
trees
2400
x1150
1860E
Fast Travel Text Editor
data structures
,
dfs and similar
,
graphs
,
shortest paths
2400
x1296
1370F1
The Hidden Pair (Easy Version)
binary search
,
dfs and similar
,
graphs
,
interactive
,
shortest paths
,
trees
2400
x1361
1482F
Useful Edges
graphs
,
shortest paths
2400
x1470
1442C
Graph Transpositions
dfs and similar
,
graphs
,
greedy
,
shortest paths
2400
x1579
1749E
Cactus Wall
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1598
1715E
Long Way Home
data structures
,
divide and conquer
,
dp
,
geometry
,
graphs
,
greedy
,
shortest paths
2400
x1601
525D
Arthur and Walls
constructive algorithms
,
data structures
,
graphs
,
greedy
,
shortest paths
2400
x1634
1753D
The Beach
constructive algorithms
,
dfs and similar
,
graphs
,
shortest paths
2400
x1662
1340C
Nastya and Unexpected Guest
dfs and similar
,
dp
,
graphs
,
shortest paths
2400
x2020
1051F
The Shortest Statement
graphs
,
shortest paths
,
trees
2400
x2669
1473E
Minimum Path
graphs
,
shortest paths
2400
x3300
648E
Собери число
graphs
,
shortest paths
2300
x83
254D
Rats
brute force
,
dfs and similar
,
graphs
,
implementation
,
shortest paths
2300
x497
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