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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
29:55:46
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Difficulty:
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flows
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
1746G
Olympiad Training
binary search
,
data structures
,
dp
,
flows
,
geometry
,
implementation
,
sortings
3500
x88
1852F
Panda Meetups
data structures
,
dp
,
flows
3500
x93
1178H
Stock Exchange
binary search
,
flows
,
graphs
3500
x204
1023G
Pisces
data structures
,
flows
,
trees
3400
x111
793G
Oleg and chess
data structures
,
divide and conquer
,
flows
,
graph matchings
3400
x304
1630F
Making It Bipartite
flows
,
graph matchings
,
graphs
,
number theory
3400
x482
1427G
One Billion Shades of Grey
flows
,
graphs
3300
x255
1368H1
Breadboard Capacity (easy version)
dp
,
flows
,
greedy
3300
x321
1416F
Showing Off
flows
,
graph matchings
,
greedy
,
implementation
3300
x331
1408H
Rainbow Triples
binary search
,
data structures
,
flows
,
greedy
3300
x344
1517G
Starry Night Camping
constructive algorithms
,
flows
,
graphs
3300
x409
1861F
Four Suits
binary search
,
bitmasks
,
flows
,
greedy
3200
x141
1666K
Kingdom Partition
flows
3200
x172
1383F
Special Edges
flows
,
graphs
3200
x286
1519F
Chests and Keys
bitmasks
,
brute force
,
dfs and similar
,
dp
,
flows
3200
x373
611H
New Year and Forgotten Tree
constructive algorithms
,
flows
,
graphs
3200
x574
786E
ALT
data structures
,
flows
,
graphs
,
trees
3200
x592
1488I
Demonic Invasion
*special problem
,
flows
3100
x33
925F
Parametric Circulation
binary search
,
flows
3100
x93
1250K
Projectors
flows
,
graphs
3100
x144
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x166
1728F
Fishermen
flows
,
graph matchings
,
greedy
3100
x368
1307G
Cow and Exercise
flows
,
graphs
,
shortest paths
3100
x425
704D
Captain America
flows
,
greedy
3100
x770
457E
Flow Optimality
constructive algorithms
,
flows
,
math
3000
x80
223E
Planar Graph
flows
,
geometry
,
graphs
3000
x171
212A
Privatization
flows
,
graphs
3000
x182
843E
Maximum Flow
flows
,
graphs
3000
x276
1615H
Reindeer Games
binary search
,
constructive algorithms
,
data structures
,
divide and conquer
,
flows
,
graphs
,
shortest paths
3000
x304
739E
Gosha is hunting
brute force
,
data structures
,
dp
,
flows
,
math
,
probabilities
,
sortings
3000
x2020
126E
Pills
brute force
,
flows
2900
x81
736E
Chess Championship
constructive algorithms
,
flows
,
greedy
,
math
2900
x176
848D
Shake It!
combinatorics
,
dp
,
flows
,
graphs
2900
x358
434D
Nanami's Power Plant
flows
2900
x394
1288F
Red-Blue Graph
constructive algorithms
,
flows
2900
x435
343E
Pumping Stations
brute force
,
dfs and similar
,
divide and conquer
,
flows
,
graphs
,
greedy
,
trees
2900
x665
708D
Incorrect Flow
flows
2900
x672
802O
April Fools' Problem (hard)
binary search
,
data structures
,
flows
2900
x786
103E
Buying Sets
flows
,
graph matchings
2900
x809
724E
Goods transportation
dp
,
flows
,
greedy
2900
x1194
1766F
MCF
flows
2800
x252
513F2
Scaygerboss
flows
2800
x303
1525F
Goblins And Gnomes
brute force
,
dp
,
flows
,
graph matchings
2800
x314
1721F
Matching Reduction
brute force
,
constructive algorithms
,
dfs and similar
,
flows
,
graph matchings
,
graphs
,
interactive
2800
x353
1572D
Bridge Club
flows
,
graph matchings
,
graphs
,
greedy
2800
x456
1684G
Euclid Guess
constructive algorithms
,
flows
,
graph matchings
,
math
,
number theory
2800
x565
1592F2
Alice and Recoloring 2
constructive algorithms
,
flows
,
graph matchings
,
greedy
2800
x650
1919F2
Wine Factory (Hard Version)
data structures
,
dp
,
flows
,
greedy
,
matrices
2800
x712
1404E
Bricks
flows
,
graph matchings
,
graphs
2800
x1053
280D
k-Maximum Subsequence Sum
data structures
,
flows
,
graphs
,
implementation
2800
x1148
1184B3
The Doctor Meets Vader (Hard)
flows
,
shortest paths
2700
x165
62E
World Evil
dp
,
flows
2700
x212
1682F
MCMF?
data structures
,
flows
,
graphs
,
greedy
,
sortings
,
two pointers
2700
x283
513F1
Scaygerboss
flows
2700
x290
1054F
Electric Scheme
flows
,
graph matchings
2700
x303
903G
Yet Another Maxflow Problem
data structures
,
flows
,
graphs
2700
x500
132E
Bits of merry old England
flows
,
graphs
2700
x512
1264E
Beautiful League
constructive algorithms
,
flows
,
graph matchings
2700
x728
1146G
Zoning Restrictions
dp
,
flows
,
graphs
2700
x770
1473F
Strange Set
flows
,
math
2700
x881
1773D
Dominoes
combinatorics
,
flows
,
graph matchings
,
greedy
2600
x408
1061E
Politics
flows
,
graphs
2600
x507
802C
Heidi and Library (hard)
flows
2600
x516
1430G
Yet Another DAG Problem
bitmasks
,
dfs and similar
,
dp
,
flows
,
graphs
,
math
2600
x597
818G
Four Melodies
flows
,
graphs
2600
x599
1510B
Button Lock
flows
,
graph matchings
,
graphs
2600
x696
1107F
Vasya and Endless Credits
dp
,
flows
,
graph matchings
,
graphs
,
sortings
2600
x706
813D
Two Melodies
dp
,
flows
2600
x944
1045A
Last chance
data structures
,
flows
,
graph matchings
,
graphs
,
trees
2500
x313
1187G
Gang Up
flows
,
graphs
2500
x485
1717F
Madoka and The First Session
constructive algorithms
,
flows
,
graph matchings
,
graphs
,
implementation
2500
x499
1709F
Multiset of Strings
bitmasks
,
brute force
,
dp
,
fft
,
flows
,
graphs
,
math
,
meet-in-the-middle
,
trees
2500
x520
976F
Minimal k-covering
flows
,
graphs
2500
x542
628F
Bear and Fair Set
flows
,
graphs
2500
x716
1783F
Double Sort II
dfs and similar
,
flows
,
graph matchings
,
graphs
2500
x872
884F
Anti-Palindromize
flows
,
graphs
,
greedy
2500
x919
1198E
Rectangle Painting 2
flows
,
graph matchings
,
graphs
2500
x943
1354F
Summoning Minions
constructive algorithms
,
dp
,
flows
,
graph matchings
,
greedy
,
sortings
2500
x969
720B
Cactusophobia
dfs and similar
,
flows
2400
x387
1070I
Privatization of Roads in Berland
flows
,
graph matchings
,
graphs
2400
x517
847J
Students Initiation
binary search
,
flows
,
graphs
2400
x600
717G
Underfail
flows
2400
x606
1765A
Access Levels
bitmasks
,
dsu
,
flows
,
graph matchings
2400
x649
1009G
Allowed Letters
bitmasks
,
flows
,
graph matchings
,
graphs
,
greedy
2400
x755
1263F
Economic Difficulties
data structures
,
dfs and similar
,
dp
,
flows
,
graphs
,
trees
2400
x830
164C
Machine Programming
flows
,
graphs
2400
x856
1913E
Matrix Problem
flows
,
graphs
2400
x861
802N
April Fools' Problem (medium)
binary search
,
flows
,
graphs
2400
x1042
808F
Card Game
binary search
,
flows
,
graphs
2400
x1046
277E
Binary Tree on Plane
flows
,
trees
2400
x1202
1455E
Four Points
brute force
,
constructive algorithms
,
flows
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
2400
x1418
1139E
Maximize Mex
flows
,
graph matchings
,
graphs
2400
x1607
1082G
Petya and Graph
flows
,
graphs
2400
x1893
491C
Deciphering
flows
,
graph matchings
2300
x378
78E
Evacuation
flows
,
graphs
,
shortest paths
2300
x524
1252L
Road Construction
flows
,
graphs
2300
x564
1090E
Horseback Riding
flows
,
graphs
2300
x572
316C2
Tidying Up
flows
,
graph matchings
2300
x605
362E
Petya and Pipes
flows
,
graphs
,
shortest paths
2300
x787
311E
Biologist
flows
2300
x1024
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