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Before contest
Kotlin Heroes: Practice 6
23:29:12
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Before contest
Educational Codeforces Round 105 (Rated for Div. 2)
24:29:12
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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
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Custom test
Problems
#
Name
1369A
FashionabLee
geometry
,
math
800
x24357
1398A
Bad Triangle
geometry
,
math
800
x20920
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x19082
1466A
Bovine Dilemma
brute force
,
geometry
,
math
800
x18364
1422A
Fence
geometry
,
math
800
x15952
1064A
Make a triangle!
brute force
,
geometry
,
math
800
x14400
900A
Find Extra One
geometry
,
implementation
800
x10116
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x3978
1047B
Cover Points
geometry
,
math
900
x12316
706A
Beru-taxi
brute force
,
geometry
,
implementation
900
x11508
6A
Triangle
brute force
,
geometry
900
x11093
127A
Wasted Time
geometry
900
x7243
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x17173
1199B
Water Lily
geometry
,
math
1000
x13351
1450B
Balls of Steel
brute force
,
geometry
,
greedy
1000
x10922
1248A
Integer Points
geometry
,
math
1000
x10716
157B
Trace
geometry
,
sortings
1000
x8635
859B
Lazy Security Guard
brute force
,
geometry
,
math
1000
x5159
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x25248
224A
Parallelepiped
brute force
,
geometry
,
math
1100
x12938
1030B
Vasya and Cornfield
geometry
1100
x9223
842B
Gleb And Pizza
geometry
1100
x8168
596A
Wilbur and Swimming Pool
geometry
,
implementation
1100
x6089
667A
Pouring Rain
geometry
,
math
1100
x6045
667B
Coat of Anticubism
constructive algorithms
,
geometry
1100
x4619
1100C
NN and the Optical Illusion
binary search
,
geometry
,
math
1200
x7728
749B
Parallelogram is Back
brute force
,
constructive algorithms
,
geometry
1200
x6816
794B
Cutting Carrot
geometry
,
math
1200
x4907
80B
Depression
geometry
,
math
1200
x3209
9B
Running Student
brute force
,
geometry
,
implementation
1200
x3183
683A
The Check of the Point
*special problem
,
geometry
1200
x615
1307B
Cow and Friend
geometry
,
greedy
,
math
1300
x10007
750B
New Year and North Pole
geometry
,
implementation
1300
x8136
1271C
Shawarma Tent
brute force
,
geometry
,
greedy
,
implementation
1300
x7772
820B
Mister B and Angle in Polygon
constructive algorithms
,
geometry
,
math
1300
x4438
227A
Where do I Turn?
geometry
1300
x3176
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x2187
507B
Amr and Pins
geometry
,
math
1400
x15328
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x13118
1354C1
Simple Polygon Embedding
binary search
,
geometry
,
math
,
ternary search
1400
x12092
650A
Watchmen
data structures
,
geometry
,
math
1400
x10640
1156A
Inscribed Figures
geometry
1400
x6292
851B
Arpa and an exam about geometry
geometry
,
math
1400
x4395
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x4223
141B
Hopscotch
geometry
,
math
1400
x3748
1486B
Eastern Exhibition
binary search
,
geometry
,
shortest paths
,
sortings
1500
x8860
908C
New Year and Curling
brute force
,
geometry
,
implementation
,
math
1500
x5781
659D
Bicycle Race
geometry
,
implementation
,
math
1500
x5029
18A
Triangle
brute force
,
geometry
1500
x3641
100I
Rotation
*special problem
,
geometry
,
math
1500
x189
559A
Gerald's Hexagon
brute force
,
geometry
,
math
1600
x8311
1096C
Polygon for the Angle
brute force
,
geometry
1600
x5262
935C
Fifa and Fafa
geometry
1600
x4050
407A
Triangle
brute force
,
geometry
,
implementation
,
math
1600
x3874
1028C
Rectangles
geometry
,
implementation
,
sortings
1600
x3624
593B
Anton and Lines
geometry
,
sortings
1600
x3523
618C
Constellation
geometry
,
implementation
1600
x3499
231D
Magic Box
brute force
,
geometry
1600
x3413
993A
Two Squares
geometry
,
implementation
1600
x3260
849B
Tell Your World
brute force
,
geometry
1600
x3045
135B
Rectangle and Square
brute force
,
geometry
,
math
1600
x1945
958E1
Guard Duty (easy)
brute force
,
geometry
,
greedy
,
math
1600
x1152
1451D
Circle Game
games
,
geometry
,
math
1700
x6494
498A
Crazy Town
geometry
1700
x5342
1216C
White Sheet
geometry
,
math
1700
x4971
1237C1
Balanced Removals (Easier)
constructive algorithms
,
geometry
,
greedy
1700
x4741
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x4467
578A
A Problem about Polyline
geometry
,
math
1700
x4154
140A
New Year Table
geometry
,
math
1700
x3552
581D
Three Logos
bitmasks
,
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x2720
850A
Five Dimensional Points
brute force
,
geometry
,
math
1700
x2704
14C
Four Segments
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x2204
1468F
Full Turn
geometry
,
hashing
,
number theory
1700
x2122
203D
Hit Ball
geometry
,
implementation
,
math
1700
x1253
630Q
Pyramids
geometry
,
math
1700
x889
183B
Zoo
brute force
,
geometry
1700
x486
1030D
Vasya and Triangle
geometry
,
number theory
1800
x4778
1299B
Aerodynamic
geometry
1800
x4188
671A
Recycling Bottles
dp
,
geometry
,
greedy
,
implementation
1800
x3734
257C
View Angle
brute force
,
geometry
,
math
1800
x3266
772B
Volatile Kite
geometry
1800
x2620
190B
Surrounded
geometry
1800
x2272
452B
4-point polyline
brute force
,
constructive algorithms
,
geometry
,
trees
1800
x1817
24C
Sequence of points
geometry
,
implementation
,
math
1800
x932
630M
Turn
geometry
,
math
1800
x844
552D
Vanya and Triangles
brute force
,
combinatorics
,
data structures
,
geometry
,
math
,
sortings
1900
x3452
613A
Peter and Snow Blower
binary search
,
geometry
,
ternary search
1900
x2800
660D
Number of Parallelograms
geometry
1900
x2595
1163C2
Power Transmission (Hard Edition)
data structures
,
geometry
,
implementation
,
math
1900
x2515
1163C1
Power Transmission (Easy Edition)
brute force
,
geometry
1900
x2394
1032D
Barcelonian Distance
geometry
,
implementation
1900
x2181
1063C
Dwarves, Hats and Extrasensory Abilities
binary search
,
constructive algorithms
,
geometry
,
interactive
1900
x2139
342C
Cupboard and Balloons
geometry
1900
x1580
848B
Rooter's Song
constructive algorithms
,
data structures
,
geometry
,
implementation
,
sortings
,
two pointers
1900
x1476
195D
Analyzing Polyline
geometry
,
math
,
sortings
1900
x846
250D
Building Bridge
geometry
,
ternary search
,
two pointers
1900
x723
120J
Minimum Sum
divide and conquer
,
geometry
,
sortings
1900
x708
199B
Special Olympics
geometry
1900
x616
1354C2
Not So Simple Polygon Embedding
binary search
,
brute force
,
geometry
,
math
2000
x4705
961D
Pair Of Lines
geometry
2000
x2852
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