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Contest is running
Kotlin Heroes: Practice 6
06:47:30
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Kotlin Heroes: Episode 6
07:47:30
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Difficulty:
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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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Custom test
Problems
#
Name
266B
Queue at the School
constructive algorithms
,
graph matchings
,
implementation
,
shortest paths
800
x58165
3A
Shortest path of the king
greedy
,
shortest paths
1000
x12054
370A
Rook, Bishop and King
graphs
,
math
,
shortest paths
1100
x5890
1360E
Polygon
dp
,
graphs
,
implementation
,
shortest paths
1300
x16134
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x25869
198B
Jumping on Walls
shortest paths
1400
x2656
1418C
Mortal Kombat Tower
dp
,
graphs
,
greedy
,
shortest paths
1500
x9727
1486B
Eastern Exhibition
binary search
,
geometry
,
shortest paths
,
sortings
1500
x9288
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x8991
329B
Biridian Forest
dfs and similar
,
shortest paths
1500
x4209
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x3575
17B
Hierarchy
dfs and similar
,
dsu
,
greedy
,
shortest paths
1500
x2519
601A
The Two Routes
graphs
,
shortest paths
1600
x7951
1437D
Minimal Height Tree
graphs
,
greedy
,
shortest paths
,
trees
1600
x7473
986A
Fair
graphs
,
greedy
,
number theory
,
shortest paths
1600
x4728
689B
Mike and Shortcuts
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x4288
954D
Fight Against Traffic
dfs and similar
,
graphs
,
shortest paths
1600
x4193
916C
Jamie and Interesting Graph
constructive algorithms
,
graphs
,
shortest paths
1600
x3851
793B
Igor and his way to work
dfs and similar
,
graphs
,
implementation
,
shortest paths
1600
x3221
253C
Text Editor
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x1846
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x9567
1037D
Valid BFS?
dfs and similar
,
graphs
,
shortest paths
,
trees
1700
x8114
295B
Greg and Graph
dp
,
graphs
,
shortest paths
1700
x6976
598D
Igor In the Museum
dfs and similar
,
graphs
,
shortest paths
1700
x6496
339C
Xenia and Weights
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x6329
1249E
By Elevator or Stairs?
dp
,
shortest paths
1700
x5861
1176E
Cover it!
dfs and similar
,
dsu
,
graphs
,
shortest paths
,
trees
1700
x5722
1204C
Anna, Svyatoslav and Maps
dp
,
graphs
,
greedy
,
shortest paths
1700
x5207
1320B
Navigation System
dfs and similar
,
graphs
,
shortest paths
1700
x4549
1202B
You Are Given a Decimal String...
brute force
,
dp
,
shortest paths
1700
x3508
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x3042
585B
Phillip and Trains
dfs and similar
,
graphs
,
shortest paths
1700
x2983
769C
Cycle In Maze
*special problem
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1700
x1398
1283D
Christmas Trees
graphs
,
greedy
,
shortest paths
1800
x4977
242C
King's Path
dfs and similar
,
graphs
,
hashing
,
shortest paths
1800
x4570
1063B
Labyrinth
graphs
,
shortest paths
1800
x4416
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x3678
1076D
Edge Deletion
graphs
,
greedy
,
shortest paths
1800
x3196
1081D
Maximum Distance
dsu
,
graphs
,
shortest paths
,
sortings
1800
x2682
33B
String Problem
shortest paths
1800
x2113
1067B
Multihedgehog
dfs and similar
,
graphs
,
shortest paths
1800
x1895
173B
Chamber of Secrets
dfs and similar
,
shortest paths
1800
x1586
187B
AlgoRace
dp
,
shortest paths
1800
x1340
20C
Dijkstra?
graphs
,
shortest paths
1900
x14066
1205B
Shortest Cycle
bitmasks
,
brute force
,
graphs
,
shortest paths
1900
x4706
1307D
Cow and Fields
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
sortings
1900
x4253
1245D
Shichikuji and Power Grid
dsu
,
graphs
,
greedy
,
shortest paths
,
trees
1900
x3912
1272E
Nearest Opposite Parity
dfs and similar
,
graphs
,
shortest paths
1900
x3601
25C
Roads in Berland
graphs
,
shortest paths
1900
x3411
558C
Amr and Chemistry
brute force
,
graphs
,
greedy
,
math
,
shortest paths
1900
x3332
1421D
Hexagons
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
shortest paths
1900
x3255
472D
Design Tutorial: Inverse the Problem
dfs and similar
,
dsu
,
shortest paths
,
trees
1900
x3229
1105D
Kilani and the Game
dfs and similar
,
graphs
,
implementation
,
shortest paths
1900
x3104
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x2770
780D
Innokenty and a Football League
2-sat
,
graphs
,
greedy
,
implementation
,
shortest paths
,
strings
1900
x2517
144D
Missile Silos
data structures
,
dfs and similar
,
graphs
,
shortest paths
1900
x2490
95C
Volleyball
shortest paths
1900
x1901
208C
Police Station
dp
,
graphs
,
shortest paths
1900
x1349
449B
Jzzhu and Cities
graphs
,
greedy
,
shortest paths
2000
x4390
1349C
Orac and Game of Life
dfs and similar
,
graphs
,
implementation
,
shortest paths
2000
x3305
1304E
1-Trees and Queries
data structures
,
dfs and similar
,
shortest paths
,
trees
2000
x3258
1183E
Subsequences (easy version)
dp
,
graphs
,
implementation
,
shortest paths
2000
x3139
938D
Buy a Ticket
data structures
,
graphs
,
shortest paths
2000
x3059
545E
Paths and Trees
graphs
,
greedy
,
shortest paths
2000
x2873
400D
Dima and Bacteria
dsu
,
graphs
,
shortest paths
2000
x2187
666B
World Tour
graphs
,
shortest paths
2000
x1577
676D
Theseus and labyrinth
graphs
,
implementation
,
shortest paths
2000
x1560
59E
Shortest Path
graphs
,
shortest paths
2000
x1439
366D
Dima and Trap Graph
binary search
,
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
two pointers
2000
x971
33D
Knights
geometry
,
graphs
,
shortest paths
,
sortings
2000
x822
1343E
Weights Distributing
brute force
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x3606
1393D
Rarity and New Dress
dfs and similar
,
dp
,
implementation
,
shortest paths
2100
x2973
543B
Destroying Roads
constructive algorithms
,
graphs
,
shortest paths
2100
x2921
796D
Police Stations
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
2100
x2829
1433G
Reducing Delivery Cost
brute force
,
graphs
,
shortest paths
2100
x2636
877D
Olya and Energy Drinks
data structures
,
dfs and similar
,
graphs
,
shortest paths
2100
x2556
1472G
Moving to the Capital
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2377
507E
Breaking Good
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2033
301B
Yaroslav and Time
binary search
,
graphs
,
shortest paths
2100
x1772
912D
Fishes
data structures
,
graphs
,
greedy
,
probabilities
,
shortest paths
2100
x1443
295C
Greg and Friends
combinatorics
,
dp
,
graphs
,
shortest paths
2100
x1360
793D
Presents in Bankopolis
dp
,
graphs
,
shortest paths
2100
x1123
1005F
Berland and the Shortest Paths
brute force
,
dfs and similar
,
graphs
,
shortest paths
2100
x949
1184E2
Daleks' Invasion (medium)
dfs and similar
,
graphs
,
shortest paths
,
trees
2100
x640
852D
Exploration plan
binary search
,
flows
,
graph matchings
,
shortest paths
2100
x603
386D
Game with Points
dp
,
graphs
,
implementation
,
shortest paths
2100
x288
590C
Three States
dfs and similar
,
graphs
,
shortest paths
2200
x1886
1486E
Paired Payment
binary search
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graphs
,
shortest paths
2200
x1668
1070A
Find a Number
dp
,
graphs
,
number theory
,
shortest paths
2200
x1605
1196F
K-th Path
brute force
,
constructive algorithms
,
shortest paths
,
sortings
2200
x1544
567E
President and Roads
dfs and similar
,
graphs
,
hashing
,
shortest paths
2200
x1146
1227E
Arson In Berland Forest
binary search
,
graphs
,
shortest paths
2200
x1117
1065D
Three Pieces
dfs and similar
,
dp
,
shortest paths
2200
x1003
821D
Okabe and City
dfs and similar
,
graphs
,
shortest paths
2200
x955
369D
Valera and Fools
dfs and similar
,
dp
,
graphs
,
shortest paths
2200
x880
575G
Run for beer
dfs and similar
,
shortest paths
2200
x649
1184B2
The Doctor Meets Vader (Medium)
flows
,
graph matchings
,
graphs
,
shortest paths
,
sortings
2200
x423
182A
Battlefield
geometry
,
graphs
,
implementation
,
shortest paths
2200
x232
786B
Legacy
data structures
,
graphs
,
shortest paths
2300
x2293
1422D
Returning Home
graphs
,
shortest paths
,
sortings
2300
x1878
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