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Codeforces Round #541 (Div. 2)
06:13:32
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Difficulty:
—
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
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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Problems
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Custom test
Problems
#
Name
270A
Fancy Fence
geometry
,
implementation
,
math
1200
x14126
766B
Mahmoud and a Triangle
constructive algorithms
,
geometry
,
greedy
,
math
,
number theory
,
sortings
1100
x9963
507B
Amr and Pins
geometry
,
math
1400
x9451
706A
Beru-taxi
brute force
,
geometry
,
implementation
1100
x9315
1047B
Cover Points
geometry
,
math
900
x8329
514B
Han Solo and Lazer Gun
brute force
,
data structures
,
geometry
,
implementation
,
math
1400
x8323
1064A
Make a triangle!
brute force
,
geometry
,
math
700
x8177
900A
Find Extra One
geometry
,
implementation
900
x7388
6A
Triangle
brute force
,
geometry
1300
x7283
1030B
Vasya and Cornfield
geometry
1100
x7153
650A
Watchmen
data structures
,
geometry
,
math
1500
x6979
842B
Gleb And Pizza
geometry
1100
x6722
559A
Gerald's Hexagon
brute force
,
geometry
,
math
1600
x6415
749B
Parallelogram is Back
brute force
,
constructive algorithms
,
geometry
1300
x5940
157B
Trace
geometry
,
sortings
1100
x5786
1100C
NN and the Optical Illusion
binary search
,
geometry
,
math
1300
x5587
127A
Wasted Time
geometry
1000
x4975
908C
New Year and Curling
brute force
,
geometry
,
implementation
,
math
1500
x4902
667A
Pouring Rain
geometry
,
math
1100
x4665
498A
Crazy Town
geometry
1600
x4320
659D
Bicycle Race
geometry
,
implementation
,
math
1500
x4165
820B
Mister B and Angle in Polygon
constructive algorithms
,
geometry
,
math
1300
x3976
667B
Coat of Anticubism
constructive algorithms
,
geometry
1100
x3902
1096C
Polygon for the Angle
brute force
,
geometry
1600
x3867
794B
Cutting Carrot
geometry
,
math
1300
x3779
851B
Arpa and an exam about geometry
geometry
,
math
1400
x3729
1030D
Vasya and Triangle
geometry
,
number theory
1700
x3638
578A
A Problem about Polyline
geometry
,
math
1700
x3629
279A
Point on Spiral
brute force
,
geometry
,
implementation
1400
x3370
935C
Fifa and Fafa
geometry
1700
x3335
593B
Anton and Lines
geometry
,
sortings
1600
x3149
671A
Recycling Bottles
dp
,
geometry
,
greedy
,
implementation
1800
x3133
140A
New Year Table
geometry
,
math
1700
x3127
407A
Triangle
brute force
,
geometry
,
implementation
,
math
1700
x3035
618C
Constellation
geometry
,
implementation
1600
x3006
1028C
Rectangles
geometry
,
implementation
,
sortings
1600
x2973
1C
Ancient Berland Circus
geometry
,
math
2100
x2911
552D
Vanya and Triangles
brute force
,
combinatorics
,
data structures
,
geometry
,
math
,
sortings
1900
x2848
141B
Hopscotch
geometry
,
math
1400
x2763
227A
Where do I Turn?
geometry
1400
x2691
231D
Magic Box
brute force
,
geometry
1600
x2600
18A
Triangle
brute force
,
geometry
1600
x2588
993A
Two Squares
geometry
,
implementation
1700
x2580
849B
Tell Your World
brute force
,
geometry
1600
x2555
613A
Peter and Snow Blower
binary search
,
geometry
,
ternary search
1900
x2413
80B
Depression
geometry
,
math
1200
x2410
850A
Five Dimensional Points
brute force
,
geometry
,
math
1700
x2398
257C
View Angle
brute force
,
geometry
,
math
1700
x2263
772B
Volatile Kite
geometry
1800
x2222
9B
Running Student
brute force
,
geometry
,
implementation
1500
x2099
474C
Captain Marmot
brute force
,
geometry
1900
x2048
961D
Pair Of Lines
geometry
1900
x2002
319C
Kalila and Dimna in the Logging Industry
dp
,
geometry
2400
x1888
763B
Timofey and rectangles
constructive algorithms
,
geometry
2200
x1799
190B
Surrounded
geometry
1600
x1778
181A
Series of Crimes
brute force
,
geometry
,
implementation
800
x1710
660D
Number of Parallelograms
geometry
1900
x1684
1063C
Dwarves, Hats and Extrasensory Abilities
binary search
,
constructive algorithms
,
geometry
1900
x1682
135B
Rectangle and Square
brute force
,
geometry
,
math
1600
x1670
1032D
Barcelonian Distance
geometry
,
implementation
1900
x1665
452B
4-point polyline
brute force
,
constructive algorithms
,
geometry
,
trees
1800
x1636
576C
Points on Plane
constructive algorithms
,
divide and conquer
,
geometry
,
greedy
,
sortings
2300
x1613
598C
Nearest vectors
geometry
,
sortings
2200
x1605
14C
Four Segments
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1800
x1585
1059D
Nature Reserve
binary search
,
geometry
,
ternary search
2200
x1463
814D
An overnight dance in discotheque
dfs and similar
,
dp
,
geometry
,
greedy
,
trees
2000
x1366
464B
Restore Cube
brute force
,
geometry
2200
x1351
590B
Chip 'n Dale Rescue Rangers
binary search
,
geometry
,
math
2100
x1347
342C
Cupboard and Balloons
geometry
1800
x1343
429D
Tricky Function
data structures
,
divide and conquer
,
geometry
2100
x1338
975D
Ghosts
geometry
,
math
2000
x1287
703C
Chris and Road
geometry
,
implementation
2100
x1275
848B
Rooter's Song
constructive algorithms
,
data structures
,
geometry
,
implementation
,
sortings
,
two pointers
2100
x1216
340B
Maximal Area Quadrilateral
brute force
,
geometry
2000
x1210
280A
Rectangle Puzzle
geometry
2000
x1025
203D
Hit Ball
geometry
,
implementation
,
math
1700
x1023
995C
Leaving the Bar
brute force
,
data structures
,
geometry
,
greedy
,
math
,
sortings
2200
x1003
166B
Polygons
geometry
,
sortings
2000
x984
993C
Careful Maneuvering
bitmasks
,
brute force
,
geometry
2100
x940
600D
Area of Two Circles' Intersection
geometry
2000
x933
958E1
Guard Duty (easy)
brute force
,
geometry
,
greedy
,
math
1800
x912
793C
Mice problem
geometry
,
implementation
,
math
,
sortings
2200
x875
2C
Commentator problem
geometry
2600
x829
1036E
Covered Points
fft
,
geometry
,
number theory
2300
x790
406D
Hill Climbing
dfs and similar
,
geometry
,
trees
2200
x770
610D
Vika and Segments
data structures
,
geometry
,
two pointers
2300
x763
24C
Sequence of points
geometry
,
implementation
,
math
1800
x763
605C
Freelancer's Dreams
geometry
2500
x744
1044C
Optimal Polygon Perimeter
dp
,
geometry
2200
x703
630Q
Pyramids
geometry
2100
x695
630M
Turn
geometry
,
math
2000
x681
631E
Product Sum
data structures
,
dp
,
geometry
2500
x678
248C
Robo-Footballer
binary search
,
geometry
1900
x606
250D
Building Bridge
geometry
,
ternary search
,
two pointers
2000
x604
277B
Set of Points
constructive algorithms
,
geometry
2400
x591
120J
Minimum Sum
divide and conquer
,
geometry
,
sortings
2000
x583
65C
Harry Potter and the Golden Snitch
binary search
,
geometry
2100
x575
196C
Paint Tree
constructive algorithms
,
divide and conquer
,
geometry
,
sortings
,
trees
2400
x567
1016E
Rest In The Shades
binary search
,
geometry
2400
x558
535E
Tavas and Pashmaks
geometry
,
math
2900
x554
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