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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
4 days
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→ Filter Problems
Difficulty:
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geometry
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
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x11907
100I
Rotation
*special problem
,
geometry
,
math
1500
x340
1725G
Garage
binary search
,
geometry
,
math
1500
x5620
18A
Triangle
brute force
,
geometry
1500
x5708
659D
Bicycle Race
geometry
,
implementation
,
math
1500
x6147
908C
New Year and Curling
brute force
,
geometry
,
implementation
,
math
1500
x6671
1850G
The Morning Star
combinatorics
,
data structures
,
geometry
,
implementation
,
math
,
sortings
1500
x11294
1616C
Representative Edges
brute force
,
geometry
,
implementation
,
math
1500
x11985
1486B
Eastern Exhibition
binary search
,
geometry
,
shortest paths
,
sortings
1500
x15286
141B
Hopscotch
geometry
,
math
1400
x5145
851B
Arpa and an exam about geometry
geometry
,
math
1400
x5440
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x5510
1156A
Inscribed Figures
geometry
1400
x8115
1648A
Weird Sum
combinatorics
,
data structures
,
geometry
,
math
,
matrices
,
sortings
1400
x11827
1805C
Place for a Selfie
binary search
,
data structures
,
geometry
,
math
1400
x12060
650A
Watchmen
data structures
,
geometry
,
math
1400
x15072
1354C1
Simple Polygon Embedding
binary search
,
geometry
,
math
,
ternary search
1400
x15336
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x20226
507B
Amr and Pins
geometry
,
math
1400
x23898
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x3862
227A
Where do I Turn?
geometry
1300
x4047
820B
Mister B and Angle in Polygon
constructive algorithms
,
geometry
,
math
1300
x5083
750B
New Year and North Pole
geometry
,
implementation
1300
x9430
1942C1
Bessie's Birthday Cake (Easy Version)
geometry
,
greedy
,
math
1300
x9643
1271C
Shawarma Tent
brute force
,
geometry
,
greedy
,
implementation
1300
x10267
1307B
Cow and Friend
geometry
,
greedy
,
math
1300
x12942
683A
The Check of the Point
*special problem
,
geometry
1200
x787
80B
Depression
geometry
,
math
1200
x4229
9B
Running Student
brute force
,
geometry
,
implementation
1200
x5209
794B
Cutting Carrot
geometry
,
math
1200
x6346
749B
Parallelogram is Back
brute force
,
constructive algorithms
,
geometry
1200
x8376
1100C
NN and the Optical Illusion
binary search
,
geometry
,
math
1200
x9736
1886B
Fear of the Dark
binary search
,
geometry
,
math
1200
x15257
1495A
Diamond Miner
geometry
,
greedy
,
math
,
sortings
1200
x16702
1846D
Rudolph and Christmas Tree
constructive algorithms
,
geometry
,
math
1200
x18401
667B
Coat of Anticubism
constructive algorithms
,
geometry
1100
x5457
596A
Wilbur and Swimming Pool
geometry
,
implementation
1100
x7616
667A
Pouring Rain
geometry
,
math
1100
x7790
842B
Gleb And Pizza
geometry
1100
x10077
1030B
Vasya and Cornfield
geometry
1100
x11887
1869B
2D Traveling
geometry
,
math
,
shortest paths
,
sortings
1100
x14535
1850E
Cardboard for Pictures
binary search
,
geometry
,
implementation
,
math
1100
x21012
224A
Parallelepiped
brute force
,
geometry
,
math
1100
x25456
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x43578
859B
Lazy Security Guard
brute force
,
geometry
,
math
1000
x6753
157B
Trace
geometry
,
sortings
1000
x12871
1248A
Integer Points
geometry
,
math
1000
x13772
1450B
Balls of Steel
brute force
,
geometry
,
greedy
1000
x14891
1539A
Contest Start
combinatorics
,
geometry
,
greedy
,
math
1000
x19627
1620B
Triangles on a Rectangle
geometry
,
greedy
,
math
1000
x19677
1199B
Water Lily
geometry
,
math
1000
x19759
1515B
Phoenix and Puzzle
brute force
,
geometry
,
math
,
number theory
1000
x24204
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x31252
127A
Wasted Time
geometry
900
x10766
706A
Beru-taxi
brute force
,
geometry
,
implementation
900
x14274
1047B
Cover Points
geometry
,
math
900
x16904
6A
Triangle
brute force
,
geometry
900
x19143
1845B
Come Together
geometry
,
implementation
,
math
900
x20930
1795B
Ideal Point
brute force
,
geometry
,
greedy
900
x21216
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x6721
900A
Find Extra One
geometry
,
implementation
800
x13388
1740B
Jumbo Extra Cheese 2
geometry
,
greedy
,
sortings
800
x13554
1781A
Parallel Projection
geometry
,
math
800
x14866
1642A
Hard Way
geometry
800
x16001
1816A
Ian Visits Mary
constructive algorithms
,
geometry
,
number theory
800
x16954
1422A
Fence
geometry
,
math
800
x20652
1928A
Rectangle Cutting
geometry
,
math
800
x21295
1713A
Traveling Salesman Problem
geometry
,
greedy
,
implementation
800
x21680
1064A
Make a triangle!
brute force
,
geometry
,
math
800
x21732
1466A
Bovine Dilemma
brute force
,
geometry
,
math
800
x22289
1806A
Walking Master
geometry
,
greedy
,
math
800
x22472
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x25352
1398A
Bad Triangle
geometry
,
math
800
x27019
1622A
Construct a Rectangle
geometry
,
math
800
x29507
1926B
Vlad and Shapes
geometry
,
implementation
800
x30018
1369A
FashionabLee
geometry
,
math
800
x35664
1791B
Following Directions
geometry
,
implementation
800
x42045
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