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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
16:47:54
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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
194A
Exams
implementation
,
math
900
x9915
193E
Fibonacci Number
brute force
,
math
,
matrices
2900
x343
193D
Two Segments
data structures
2900
x536
193C
Hamming Distance
constructive algorithms
,
greedy
,
math
,
matrices
2400
x517
193B
Xor
brute force
2000
x1013
193A
Cutting Figure
constructive algorithms
,
graphs
,
trees
1700
x4015
192B
Walking in the Rain
brute force
,
implementation
1100
x6288
192A
Funky Numbers
binary search
,
brute force
,
implementation
1300
x10445
191E
Thwarting Demonstrations
binary search
,
data structures
,
trees
2200
x856
191D
Metro Scheme
graphs
,
greedy
2700
x365
191C
Fools and Roads
data structures
,
dfs and similar
,
trees
1900
x7304
191B
Demonstration
greedy
1700
x1013
191A
Dynasty Puzzles
dp
1500
x4038
190E
Counter Attack
data structures
,
dsu
,
graphs
,
hashing
,
sortings
2100
x1553
190D
Non-Secret Cypher
two pointers
1900
x2342
190C
STL
dfs and similar
1500
x2856
190B
Surrounded
geometry
1800
x2857
190A
Vasya and the Bus
greedy
,
math
1100
x5896
189B
Counting Rhombi
brute force
,
math
1300
x3954
189A
Cut Ribbon
brute force
,
dp
1300
x67754
188H
Stack
*special problem
,
expression parsing
,
implementation
1800
x266
188G
Array Sorting
*special problem
,
implementation
1600
x334
188F
Binary Notation
*special problem
,
implementation
1400
x301
188E
HQ9+
*special problem
,
implementation
1400
x500
188D
Asterisks
*special problem
,
implementation
1100
x682
188C
LCM
*special problem
,
implementation
,
math
1400
x454
188B
A + Reverse B
*special problem
,
implementation
1300
x736
188A
Hexagonal Numbers
*special problem
1100
x781
187E
Heaven Tour
data structures
,
greedy
2900
x104
187D
BRT Contract
data structures
2800
x537
187C
Weak Memory
dfs and similar
,
dsu
2000
x1362
187B
AlgoRace
dp
,
shortest paths
1800
x1985
187A
Permutations
greedy
1500
x2817
186B
Growing Mushrooms
greedy
,
sortings
1200
x5613
186A
Comparing Strings
implementation
,
strings
1100
x17143
185E
Soap Time! - 2
binary search
,
data structures
3000
x143
185D
Visit of the Great
math
,
number theory
2600
x443
185C
Clever Fat Rat
dp
2500
x138
185B
Mushroom Scientists
math
,
ternary search
1800
x1642
185A
Plant
math
1300
x5949
183E
Candy Shop
greedy
2900
x138
183D
T-shirt
dp
,
greedy
,
probabilities
2700
x403
183C
Cyclic Coloring
dfs and similar
2200
x621
183B
Zoo
brute force
,
geometry
1700
x698
183A
Headquarters
constructive algorithms
,
math
1700
x550
182E
Wooden Fence
dp
1800
x1463
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x8104
182C
Optimal Sum
data structures
,
greedy
2000
x742
182B
Vasya's Calendar
implementation
1000
x6949
182A
Battlefield
geometry
,
graphs
,
implementation
,
shortest paths
2200
x288
181B
Number of Triplets
binary search
,
brute force
1300
x3046
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x7219
180F
Mathematical Analysis Rocks!
constructive algorithms
,
implementation
,
math
1200
x2531
180E
Cubes
binary search
,
dp
,
two pointers
1800
x1786
180D
Name
greedy
,
strings
1900
x732
180C
Letter
dp
1400
x7474
180B
Divisibility Rules
math
,
number theory
2300
x349
180A
Defragmentation
implementation
1800
x541
178F3
Representative Sampling
2500
x434
178F2
Representative Sampling
dp
,
sortings
,
strings
2200
x351
178F1
Representative Sampling
1800
x404
178E3
The Beaver's Problem - 2
2300
x201
178E2
The Beaver's Problem - 2
2000
x230
178E1
The Beaver's Problem - 2
1900
x289
178D3
Magic Squares
2100
x250
178D2
Magic Squares
1900
x273
178D1
Magic Squares
1500
x646
178C3
Smart Beaver and Resolving Collisions
2000
x324
178C2
Smart Beaver and Resolving Collisions
1900
x307
178C1
Smart Beaver and Resolving Collisions
1600
x492
178B3
Greedy Merchants
1800
x1230
178B2
Greedy Merchants
1600
x683
178B1
Greedy Merchants
1600
x765
178A3
Educational Game
greedy
1100
x1457
178A2
Educational Game
greedy
1000
x1640
178A1
Educational Game
1000
x1619
177G2
Fibonacci Strings
matrices
,
strings
2600
x204
177G1
Fibonacci Strings
strings
2400
x189
177F2
Script Generation
2300
x210
177F1
Script Generation
1800
x305
177E2
Space Voyage
binary search
1900
x433
177E1
Space Voyage
binary search
1700
x617
177D2
Encrypting Messages
data structures
1500
x2007
177D1
Encrypting Messages
brute force
1200
x2183
177C2
Party
brute force
,
dfs and similar
,
dsu
,
graphs
1500
x2582
177C1
Party
dfs and similar
,
dsu
,
graphs
1500
x2588
177B2
Rectangular Game
number theory
1200
x3031
177B1
Rectangular Game
number theory
1000
x4192
177A2
Good Matrix Elements
implementation
800
x7375
177A1
Good Matrix Elements
implementation
800
x8786
176E
Archaeology
data structures
,
dfs and similar
,
trees
3100
x1195
176D
Hyper String
dp
2500
x327
176C
Playing with Superglue
combinatorics
,
constructive algorithms
2000
x482
176B
Word Cut
dp
1700
x1837
176A
Trading Business
greedy
,
sortings
1200
x1514
175F
Gnomes of Might and Magic
data structures
,
graphs
,
implementation
,
shortest paths
3000
x66
175E
Power Defence
brute force
,
dp
,
geometry
,
greedy
2600
x266
175D
Plane of Tanks: Duel
brute force
,
dp
,
math
,
probabilities
2400
x297
175C
Geometry Horse
greedy
,
implementation
,
sortings
,
two pointers
1600
x1320
175B
Plane of Tanks: Pro
implementation
1400
x1427
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