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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
22:51:10
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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
x125078
520B
Two Buttons
dfs and similar
,
graphs
,
greedy
,
implementation
,
math
,
shortest paths
1400
x47257
20C
Dijkstra?
graphs
,
shortest paths
1900
x29214
1360E
Polygon
dp
,
graphs
,
implementation
,
shortest paths
1300
x24232
3A
Shortest path of the king
greedy
,
shortest paths
1000
x18417
1418C
Mortal Kombat Tower
dp
,
graphs
,
greedy
,
shortest paths
1500
x17774
1759C
Thermostat
greedy
,
math
,
shortest paths
1100
x16817
1661B
Getting Zero
bitmasks
,
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1300
x16782
1365D
Solve The Maze
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
shortest paths
1700
x15894
1486B
Eastern Exhibition
binary search
,
geometry
,
shortest paths
,
sortings
1500
x15049
1869B
2D Traveling
geometry
,
math
,
shortest paths
,
sortings
1100
x13939
1106D
Lunar New Year and a Wander
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
1500
x13737
1547E
Air Conditioners
data structures
,
dp
,
implementation
,
shortest paths
,
sortings
,
two pointers
1500
x13655
1540A
Great Graphs
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
sortings
1400
x13606
1037D
Valid BFS?
dfs and similar
,
graphs
,
shortest paths
,
trees
1700
x13592
295B
Greg and Graph
dp
,
graphs
,
shortest paths
1700
x12774
1948C
Arrow Path
brute force
,
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
1300
x12445
1437D
Minimal Height Tree
graphs
,
greedy
,
shortest paths
,
trees
1600
x12224
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x11822
601A
The Two Routes
graphs
,
shortest paths
1600
x11287
1176E
Cover it!
dfs and similar
,
dsu
,
graphs
,
shortest paths
,
trees
1700
x10269
1695C
Zero Path
brute force
,
data structures
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x10217
598D
Igor In the Museum
dfs and similar
,
graphs
,
shortest paths
1700
x10201
1833E
Round Dance
dfs and similar
,
dsu
,
graphs
,
shortest paths
1600
x9926
370A
Rook, Bishop and King
graphs
,
math
,
shortest paths
1100
x9782
1681D
Required Length
brute force
,
dfs and similar
,
dp
,
hashing
,
shortest paths
1700
x9155
1249E
By Elevator or Stairs?
dp
,
shortest paths
1700
x9139
339C
Xenia and Weights
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
greedy
,
shortest paths
1700
x8101
242C
King's Path
dfs and similar
,
graphs
,
hashing
,
shortest paths
1800
x7913
449B
Jzzhu and Cities
graphs
,
greedy
,
shortest paths
2000
x7811
1283D
Christmas Trees
graphs
,
greedy
,
shortest paths
1800
x7318
1517D
Explorer Space
dp
,
graphs
,
shortest paths
1800
x7240
1063B
Labyrinth
graphs
,
shortest paths
1800
x6978
1611E1
Escape The Maze (easy version)
dfs and similar
,
greedy
,
shortest paths
,
trees
,
two pointers
1700
x6807
1245D
Shichikuji and Power Grid
dsu
,
graphs
,
greedy
,
shortest paths
,
trees
1900
x6783
986A
Fair
graphs
,
greedy
,
number theory
,
shortest paths
1600
x6483
1899F
Alex's whims
constructive algorithms
,
graphs
,
greedy
,
shortest paths
,
trees
1600
x6416
1204C
Anna, Svyatoslav and Maps
dp
,
graphs
,
greedy
,
shortest paths
1700
x6410
1873H
Mad City
dfs and similar
,
dsu
,
games
,
graphs
,
shortest paths
,
trees
1700
x6359
1205B
Shortest Cycle
bitmasks
,
brute force
,
graphs
,
shortest paths
1900
x6259
954D
Fight Against Traffic
dfs and similar
,
graphs
,
shortest paths
1600
x6252
61D
Eternal Victory
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
trees
1800
x6186
35C
Fire Again
brute force
,
dfs and similar
,
shortest paths
1500
x6150
329B
Biridian Forest
dfs and similar
,
shortest paths
1500
x5980
1307D
Cow and Fields
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
shortest paths
,
sortings
1900
x5926
25C
Roads in Berland
graphs
,
shortest paths
1900
x5765
1320B
Navigation System
dfs and similar
,
graphs
,
shortest paths
1700
x5734
1881F
Minimum Maximum Distance
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
1700
x5700
1272E
Nearest Opposite Parity
dfs and similar
,
graphs
,
shortest paths
1900
x5694
1775D
Friendly Spiders
dfs and similar
,
graphs
,
math
,
number theory
,
shortest paths
1800
x5641
689B
Mike and Shortcuts
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x5570
786B
Legacy
data structures
,
graphs
,
shortest paths
2300
x5279
1915G
Bicycles
graphs
,
greedy
,
implementation
,
shortest paths
,
sortings
1800
x5180
1696D
Permutation Graph
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
greedy
,
shortest paths
1900
x5114
796D
Police Stations
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
2100
x5038
938D
Buy a Ticket
data structures
,
graphs
,
shortest paths
2000
x4972
472D
Design Tutorial: Inverse the Problem
dfs and similar
,
dsu
,
shortest paths
,
trees
1900
x4950
916C
Jamie and Interesting Graph
constructive algorithms
,
graphs
,
shortest paths
1600
x4893
1076D
Edge Deletion
graphs
,
greedy
,
shortest paths
1800
x4853
1304E
1-Trees and Queries
data structures
,
dfs and similar
,
shortest paths
,
trees
2000
x4813
1343E
Weights Distributing
brute force
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x4783
1651D
Nearest Excluded Points
binary search
,
data structures
,
dfs and similar
,
graphs
,
shortest paths
1900
x4744
1601B
Frog Traveler
data structures
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
two pointers
1900
x4720
1579F
Array Stabilization (AND version)
brute force
,
graphs
,
math
,
number theory
,
shortest paths
1700
x4532
1183E
Subsequences (easy version)
dp
,
graphs
,
implementation
,
shortest paths
2000
x4475
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x4426
17B
Hierarchy
dfs and similar
,
dsu
,
greedy
,
shortest paths
1500
x4419
1472G
Moving to the Capital
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x4344
1202B
You Are Given a Decimal String...
brute force
,
dp
,
shortest paths
1700
x4336
545E
Paths and Trees
graphs
,
greedy
,
shortest paths
2000
x4324
793B
Igor and his way to work
dfs and similar
,
graphs
,
implementation
,
shortest paths
1600
x4312
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x4263
1712D
Empty Graph
binary search
,
constructive algorithms
,
data structures
,
greedy
,
shortest paths
2000
x4217
1349C
Orac and Game of Life
dfs and similar
,
graphs
,
implementation
,
shortest paths
2000
x4207
1433G
Reducing Delivery Cost
brute force
,
graphs
,
shortest paths
2100
x4064
1421D
Hexagons
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
shortest paths
1900
x4039
198B
Jumping on Walls
shortest paths
1400
x4035
33B
String Problem
shortest paths
1800
x4010
1689D
Lena and Matrix
data structures
,
dp
,
geometry
,
shortest paths
1900
x3993
1105D
Kilani and the Game
dfs and similar
,
graphs
,
implementation
,
shortest paths
1900
x3959
1846G
Rudolf and CodeVid-23
bitmasks
,
dp
,
graphs
,
greedy
,
shortest paths
1900
x3939
877D
Olya and Energy Drinks
data structures
,
dfs and similar
,
graphs
,
shortest paths
2100
x3888
558C
Amr and Chemistry
brute force
,
graphs
,
greedy
,
math
,
shortest paths
1900
x3878
1081D
Maximum Distance
dsu
,
graphs
,
shortest paths
,
sortings
1800
x3858
543B
Destroying Roads
constructive algorithms
,
graphs
,
shortest paths
2100
x3818
1393D
Rarity and New Dress
dfs and similar
,
dp
,
implementation
,
shortest paths
2100
x3759
1482D
Playlist
data structures
,
dsu
,
implementation
,
shortest paths
1900
x3712
144D
Missile Silos
data structures
,
dfs and similar
,
graphs
,
shortest paths
1900
x3660
1611E2
Escape The Maze (hard version)
dfs and similar
,
dp
,
greedy
,
shortest paths
,
trees
1900
x3591
585B
Phillip and Trains
dfs and similar
,
graphs
,
shortest paths
1700
x3478
1520G
To Go Or Not To Go?
brute force
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x3433
1473E
Minimum Path
graphs
,
shortest paths
2400
x3255
1503C
Travelling Salesman Problem
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
sortings
,
two pointers
2200
x3177
1790F
Timofey and Black-White Tree
brute force
,
dfs and similar
,
divide and conquer
,
graphs
,
greedy
,
math
,
shortest paths
,
trees
2100
x3079
1506F
Triangular Paths
constructive algorithms
,
graphs
,
math
,
shortest paths
,
sortings
2000
x3075
59E
Shortest Path
graphs
,
shortest paths
2000
x3045
780D
Innokenty and a Football League
2-sat
,
graphs
,
greedy
,
implementation
,
shortest paths
,
strings
1900
x2833
173B
Chamber of Secrets
dfs and similar
,
shortest paths
1800
x2816
1815B
Sum Graph
brute force
,
constructive algorithms
,
graphs
,
implementation
,
interactive
,
shortest paths
,
trees
2000
x2801
1899G
Unusual Entertainment
data structures
,
dfs and similar
,
dsu
,
shortest paths
,
sortings
,
trees
,
two pointers
1900
x2794
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