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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
13:23:42
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→ Filter Problems
Difficulty:
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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
126B
Password
binary search
,
dp
,
hashing
,
string suffix structures
,
strings
1700
x19712
126A
Hot Bath
binary search
,
brute force
,
math
1900
x1437
125E
MST Company
binary search
,
graphs
2400
x1095
125D
Two progressions
constructive algorithms
,
greedy
2200
x416
125C
Hobbits' Party
constructive algorithms
,
greedy
1600
x932
125A
Measuring Lengths in Baden
math
1400
x2737
124B
Permutations
brute force
,
combinatorics
,
implementation
1400
x3949
123E
Maze
dfs and similar
,
dp
,
probabilities
,
trees
2500
x725
123D
String
string suffix structures
2300
x1232
123C
Brackets
combinatorics
,
dp
,
greedy
2300
x616
123B
Squares
math
1800
x1134
121E
Lucky Array
data structures
2400
x1738
121D
Lucky Segments
binary search
,
implementation
,
two pointers
2500
x277
121C
Lucky Permutation
brute force
,
combinatorics
,
number theory
1900
x1288
121B
Lucky Transformation
strings
1500
x2578
120J
Minimum Sum
divide and conquer
,
geometry
,
sortings
1900
x936
120I
Luck is in Numbers
greedy
2200
x304
120H
Brevity is Soul of Wit
graph matchings
1800
x1415
120G
Boom
implementation
1800
x690
120F
Spiders
dp
,
greedy
,
trees
1400
x3627
120E
Put Knight!
games
,
math
1400
x2744
120D
Three Sons
brute force
1400
x1936
119E
Alternative Reality
geometry
2400
x95
119D
String Transformation
hashing
,
strings
2500
x501
119C
Education Reform
dp
2000
x927
119B
Before Exam
constructive algorithms
,
implementation
,
sortings
1900
x1079
118E
Bertown roads
dfs and similar
,
graphs
2000
x6757
118D
Caesar's Legions
dp
1700
x17605
118C
Fancy Number
brute force
,
greedy
,
sortings
,
strings
1900
x2603
117E
Tree or not Tree
data structures
,
divide and conquer
,
implementation
,
trees
2900
x349
117D
Not Quick Transformation
divide and conquer
,
math
2500
x340
117C
Cycle
dfs and similar
,
graphs
2000
x2648
117B
Very Interesting Game
brute force
,
number theory
1800
x1614
115E
Linear Kingdom Races
data structures
,
dp
2400
x1622
115D
Unambiguous Arithmetic Expression
dp
,
expression parsing
2600
x399
115C
Plumber
math
2200
x600
115B
Lawnmower
greedy
,
sortings
1500
x2620
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x3717
113E
Sleeping
combinatorics
,
implementation
,
math
2700
x119
113D
Museum
math
,
matrices
,
probabilities
2700
x686
113C
Double Happiness
brute force
,
math
,
number theory
2200
x1240
113B
Petr#
brute force
,
data structures
,
hashing
,
strings
2000
x2834
113A
Grammar Lessons
implementation
,
strings
1600
x2304
111E
Petya and Rectangle
2900
x66
111D
Petya and Coloring
combinatorics
,
dp
2300
x775
111C
Petya and Spiders
bitmasks
,
dp
,
dsu
2100
x1392
111B
Petya and Divisors
binary search
,
data structures
,
number theory
1900
x3696
111A
Petya and Inequiations
greedy
1400
x4795
109E
Lucky Interval
brute force
,
math
2700
x102
109D
Lucky Sorting
constructive algorithms
,
sortings
2000
x814
109C
Lucky Tree
dp
,
dsu
,
trees
1900
x3622
109B
Lucky Probability
brute force
,
probabilities
1900
x1556
108B
Datatypes
math
,
sortings
1400
x2471
107E
Darts
geometry
,
probabilities
2700
x138
107D
Crime Management
dp
,
graphs
,
matrices
2400
x426
107C
Arrangement
bitmasks
,
dp
2400
x390
107B
Basketball Team
combinatorics
,
dp
,
math
,
probabilities
1600
x3508
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x5122
106E
Space Rescuers
geometry
,
ternary search
2100
x873
106D
Treasure Island
brute force
,
implementation
1700
x1364
106C
Buns
dp
1700
x6032
105E
Lift and Throw
brute force
2500
x192
105D
Entertaining Geodetics
brute force
,
dsu
,
implementation
2700
x139
105C
Item World
brute force
,
implementation
,
sortings
2200
x344
105B
Dark Assembly
brute force
,
probabilities
1800
x820
105A
Transmigration
implementation
1700
x1844
103E
Buying Sets
flows
,
graph matchings
2900
x882
103D
Time to Raid Cowavans
brute force
,
data structures
,
sortings
2100
x2131
103C
Russian Roulette
constructive algorithms
,
greedy
1900
x960
103B
Cthulhu
dfs and similar
,
dsu
,
graphs
1500
x8983
101E
Candies and Stones
divide and conquer
,
dp
2500
x517
101D
Castle
dp
,
greedy
,
probabilities
,
sortings
,
trees
2300
x689
101C
Vectors
implementation
,
math
2000
x703
101B
Buses
binary search
,
data structures
,
dp
1700
x2639
100J
Interval Coloring
*special problem
,
greedy
,
math
2400
x62
100I
Rotation
*special problem
,
geometry
,
math
1500
x351
100H
Battleship
*special problem
,
dfs and similar
,
implementation
2100
x79
100G
Name the album
*special problem
,
data structures
,
implementation
1800
x124
100F
Polynom
*special problem
,
implementation
1800
x135
100E
Lamps in a Line
*special problem
,
math
1600
x273
100D
World of Mouth
*special problem
,
strings
1500
x306
100C
A+B
*special problem
,
implementation
1400
x537
100B
Friendly Numbers
*special problem
,
implementation
1500
x546
98E
Help Shrek and Donkey
dp
,
games
,
math
,
probabilities
2700
x479
98D
Help Monks
constructive algorithms
2500
x185
98C
Help Greg the Dwarf
geometry
,
ternary search
2500
x310
98B
Help King
implementation
,
probabilities
,
trees
2200
x128
98A
Help Victoria the Wise
brute force
,
implementation
1700
x1216
97E
Leaders
dfs and similar
,
dsu
,
graphs
,
trees
2200
x383
97D
Robot in Basement
bitmasks
,
brute force
,
implementation
2700
x248
97C
Winning Strategy
binary search
,
graphs
,
math
,
shortest paths
2400
x303
97B
Superset
constructive algorithms
,
divide and conquer
2300
x859
97A
Domino
brute force
,
implementation
2400
x266
95E
Lucky Country
dp
,
dsu
,
graphs
2500
x1515
95D
Horse Races
dp
,
math
2500
x428
95C
Volleyball
shortest paths
1900
x2808
95B
Lucky Numbers
dp
,
greedy
1800
x1225
95A
Hockey
implementation
,
strings
1600
x1681
93E
Lostborn
dp
,
math
,
number theory
2600
x502
93D
Flags
dp
,
math
,
matrices
2500
x352
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