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Educational Codeforces Round 150 (Rated for Div. 2)
2 days
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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
1791B
Following Directions
geometry
,
implementation
800
x34240
1369A
FashionabLee
geometry
,
math
800
x33377
1622A
Construct a Rectangle
geometry
,
math
800
x27334
1398A
Bad Triangle
geometry
,
math
800
x25778
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x23951
1466A
Bovine Dilemma
brute force
,
geometry
,
math
800
x21718
1713A
Traveling Salesman Problem
geometry
,
greedy
,
implementation
800
x20732
1064A
Make a triangle!
brute force
,
geometry
,
math
800
x20019
1422A
Fence
geometry
,
math
800
x19987
1806A
Walking Master
geometry
,
greedy
,
math
800
x18548
1642A
Hard Way
geometry
800
x15298
1816A
Ian Visits Mary
constructive algorithms
,
geometry
,
number theory
800
x14821
1781A
Parallel Projection
geometry
,
math
800
x14109
1740B
Jumbo Extra Cheese 2
geometry
,
greedy
,
sortings
800
x12849
900A
Find Extra One
geometry
,
implementation
800
x12482
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x5947
1795B
Ideal Point
brute force
,
geometry
,
greedy
900
x18401
6A
Triangle
brute force
,
geometry
900
x15821
1047B
Cover Points
geometry
,
math
900
x15651
706A
Beru-taxi
brute force
,
geometry
,
implementation
900
x13136
127A
Wasted Time
geometry
900
x9814
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1000
x26255
1515B
Phoenix and Puzzle
brute force
,
geometry
,
math
,
number theory
1000
x21923
1539A
Contest Start
combinatorics
,
geometry
,
greedy
,
math
1000
x18480
1199B
Water Lily
geometry
,
math
1000
x18015
1620B
Triangles on a Rectangle
geometry
,
greedy
,
math
1000
x17550
1450B
Balls of Steel
brute force
,
geometry
,
greedy
1000
x14264
1248A
Integer Points
geometry
,
math
1000
x13120
157B
Trace
geometry
,
sortings
1000
x12043
859B
Lazy Security Guard
brute force
,
geometry
,
math
1000
x6423
270A
Fancy Fence
geometry
,
implementation
,
math
1100
x38537
224A
Parallelepiped
brute force
,
geometry
,
math
1100
x21880
1030B
Vasya and Cornfield
geometry
1100
x11157
842B
Gleb And Pizza
geometry
1100
x9464
667A
Pouring Rain
geometry
,
math
1100
x7352
596A
Wilbur and Swimming Pool
geometry
,
implementation
1100
x7001
667B
Coat of Anticubism
constructive algorithms
,
geometry
1100
x5306
1495A
Diamond Miner
geometry
,
greedy
,
math
,
sortings
1200
x15759
1100C
NN and the Optical Illusion
binary search
,
geometry
,
math
1200
x9401
749B
Parallelogram is Back
brute force
,
constructive algorithms
,
geometry
1200
x7754
794B
Cutting Carrot
geometry
,
math
1200
x5920
9B
Running Student
brute force
,
geometry
,
implementation
1200
x4730
80B
Depression
geometry
,
math
1200
x3835
683A
The Check of the Point
*special problem
,
geometry
1200
x749
1307B
Cow and Friend
geometry
,
greedy
,
math
1300
x12417
1271C
Shawarma Tent
brute force
,
geometry
,
greedy
,
implementation
1300
x9780
750B
New Year and North Pole
geometry
,
implementation
1300
x8854
820B
Mister B and Angle in Polygon
constructive algorithms
,
geometry
,
math
1300
x4935
227A
Where do I Turn?
geometry
1300
x3801
40A
Find Color
constructive algorithms
,
geometry
,
implementation
,
math
1300
x3345
507B
Amr and Pins
geometry
,
math
1400
x21789
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x18287
1354C1
Simple Polygon Embedding
binary search
,
geometry
,
math
,
ternary search
1400
x14718
650A
Watchmen
data structures
,
geometry
,
math
1400
x13686
1648A
Weird Sum
combinatorics
,
data structures
,
geometry
,
math
,
matrices
,
sortings
1400
x10424
1805C
Place for a Selfie
binary search
,
data structures
,
geometry
,
math
1400
x9616
1156A
Inscribed Figures
geometry
1400
x7365
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x5205
851B
Arpa and an exam about geometry
geometry
,
math
1400
x5186
141B
Hopscotch
geometry
,
math
1400
x4800
1486B
Eastern Exhibition
binary search
,
geometry
,
shortest paths
,
sortings
1500
x14100
1616C
Representative Edges
brute force
,
geometry
,
implementation
,
math
1500
x11061
908C
New Year and Curling
brute force
,
geometry
,
implementation
,
math
1500
x6386
659D
Bicycle Race
geometry
,
implementation
,
math
1500
x5859
18A
Triangle
brute force
,
geometry
1500
x5172
1725G
Garage
binary search
,
geometry
,
math
1500
x4633
100I
Rotation
*special problem
,
geometry
,
math
1500
x311
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x9973
559A
Gerald's Hexagon
brute force
,
geometry
,
math
1600
x9497
1096C
Polygon for the Angle
brute force
,
geometry
1600
x6071
407A
Triangle
brute force
,
geometry
,
implementation
,
math
1600
x4548
935C
Fifa and Fafa
geometry
1600
x4506
1028C
Rectangles
geometry
,
implementation
,
sortings
1600
x4154
618C
Constellation
geometry
,
implementation
1600
x4001
231D
Magic Box
brute force
,
geometry
1600
x3907
593B
Anton and Lines
geometry
,
sortings
1600
x3849
993A
Two Squares
geometry
,
implementation
1600
x3706
849B
Tell Your World
brute force
,
geometry
1600
x3372
135B
Rectangle and Square
brute force
,
geometry
,
math
1600
x2176
958E1
Guard Duty (easy)
brute force
,
geometry
,
greedy
,
math
1600
x1356
1550C
Manhattan Subarrays
brute force
,
geometry
,
greedy
,
implementation
1700
x9219
1451D
Circle Game
games
,
geometry
,
math
1700
x8751
1216C
White Sheet
geometry
,
math
1700
x7808
1598D
Training Session
combinatorics
,
data structures
,
geometry
,
implementation
,
math
1700
x7654
498A
Crazy Town
geometry
1700
x6086
1237C1
Balanced Removals (Easier)
constructive algorithms
,
geometry
,
greedy
1700
x5644
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x5597
578A
A Problem about Polyline
geometry
,
math
1700
x4556
1670D
Very Suspicious
binary search
,
brute force
,
geometry
,
greedy
,
implementation
,
math
1700
x4464
140A
New Year Table
geometry
,
math
1700
x3920
1468F
Full Turn
geometry
,
hashing
,
number theory
1700
x3282
581D
Three Logos
bitmasks
,
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3030
850A
Five Dimensional Points
brute force
,
geometry
,
math
1700
x2903
14C
Four Segments
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x2796
203D
Hit Ball
geometry
,
implementation
,
math
1700
x1362
630Q
Pyramids
geometry
,
math
1700
x1091
183B
Zoo
brute force
,
geometry
1700
x631
1030D
Vasya and Triangle
geometry
,
number theory
1800
x5505
1552C
Maximize the Intersections
combinatorics
,
constructive algorithms
,
geometry
,
greedy
,
sortings
1800
x5484
1299B
Aerodynamic
geometry
1800
x4840
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