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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
10:35:54
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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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Standings
Custom test
Problems
#
Name
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
x493
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
175A
Robot Bicorn Attack
brute force
,
implementation
1400
x2403
174C
Range Increments
data structures
,
greedy
1800
x1102
174B
File List
dp
,
greedy
,
implementation
1400
x2253
174A
Problem About Equation
math
1100
x2906
173E
Camping Groups
data structures
,
sortings
2600
x564
173D
Deputies
constructive algorithms
,
graphs
,
greedy
,
implementation
2500
x250
173C
Spiral Maximum
brute force
,
dp
1900
x989
173B
Chamber of Secrets
dfs and similar
,
shortest paths
1800
x3174
173A
Rock-Paper-Scissors
implementation
,
math
1300
x2301
172E
BHTML+BCSS
*special problem
,
dfs and similar
,
expression parsing
2200
x271
172D
Calendar Reform
*special problem
,
number theory
1500
x1402
172C
Bus
*special problem
,
implementation
,
sortings
1500
x1147
172B
Pseudorandom Sequence Period
*special problem
,
implementation
,
number theory
1200
x2790
172A
Phone Code
*special problem
,
brute force
,
implementation
800
x6168
171H
A polyline
*special problem
,
implementation
1700
x282
171G
Mysterious numbers - 2
*special problem
1600
x933
171F
ucyhf
*special problem
,
brute force
,
implementation
,
number theory
1600
x1284
171E
MYSTERIOUS LANGUAGE
*special problem
2000
x1466
171D
Broken checker
*special problem
,
brute force
1300
x2580
171C
A Piece of Cake
*special problem
,
implementation
2000
x1095
171B
Star
*special problem
,
combinatorics
1300
x4074
171A
Mysterious numbers - 1
*special problem
,
constructive algorithms
1200
x4487
169B
Replacing Digits
greedy
1100
x3318
169A
Chores
sortings
800
x6987
168B
Wizards and Minimal Spell
implementation
,
strings
1700
x1223
168A
Wizards and Demonstration
implementation
,
math
900
x10638
167E
Wizards and Bets
dfs and similar
,
graphs
,
math
,
matrices
2900
x580
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x197
167C
Wizards and Numbers
games
,
math
2300
x674
167B
Wizards and Huge Prize
dp
,
math
,
probabilities
1800
x2169
167A
Wizards and Trolleybuses
implementation
,
math
1600
x2044
166E
Tetrahedron
dp
,
math
,
matrices
1500
x21329
166D
Shoe Store
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
2500
x364
166C
Median
greedy
,
math
,
sortings
1500
x6532
166B
Polygons
geometry
,
sortings
2100
x2485
166A
Rank List
binary search
,
implementation
,
sortings
1100
x17869
165E
Compatible Numbers
bitmasks
,
brute force
,
dfs and similar
,
dp
2200
x6993
165D
Beard Graph
data structures
,
dsu
,
trees
2100
x1672
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x12373
165B
Burning Midnight Oil
binary search
,
implementation
1500
x18213
165A
Supercentral Point
implementation
1000
x23692
164E
Polycarpus and Tasks
3100
x67
164D
Minimum Diameter
binary search
,
brute force
3100
x244
164C
Machine Programming
flows
,
graphs
2400
x901
164B
Ancient Berland Hieroglyphs
two pointers
2000
x472
164A
Variable, or There and Back Again
dfs and similar
,
graphs
1700
x1018
163E
e-Government
data structures
,
dfs and similar
,
dp
,
strings
,
trees
2800
x1735
163D
Large Refrigerator
brute force
2900
x507
163C
Conveyor
sortings
,
two pointers
2100
x557
163B
Lemmings
binary search
2000
x1066
163A
Substring and Subsequence
dp
1700
x2715
162J
Brackets
*special problem
1800
x96
162I
Truncatable primes
*special problem
2000
x77
162H
Alternating case
*special problem
1800
x220
162G
Non-decimal sum
*special problem
2000
x65
162F
Factorial zeros
*special problem
1800
x202
162E
HQ9+
*special problem
1800
x178
162D
Remove digits
*special problem
1900
x228
162C
Prime factorization
*special problem
1800
x818
162B
Binary notation
*special problem
1800
x313
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