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Contest is running
Codeforces Round 937 (Div. 4)
00:31:51
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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
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math
matrices
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Problems
#
Name
1423E
5G Antenna Towers
geometry
2700
x70
1422A
Fence
geometry
,
math
800
x20574
1402B
Roads
*special problem
,
geometry
,
sortings
2900
x101
1401E
Divide Square
data structures
,
geometry
,
implementation
,
sortings
2400
x2134
1398A
Bad Triangle
geometry
,
math
800
x26889
1394C
Boboniu and String
binary search
,
geometry
,
ternary search
2600
x892
1388E
Uncle Bogdan and Projections
data structures
,
geometry
,
sortings
2700
x387
1386B
Mixture
*special problem
,
data structures
,
geometry
,
math
,
sortings
2900
x116
1381E
Origami
geometry
,
math
,
sortings
3300
x98
1375I
Cubic Lattice
geometry
,
math
,
matrices
,
number theory
3500
x75
1369A
FashionabLee
geometry
,
math
800
x35353
1368G
Shifting Dominoes
data structures
,
geometry
,
graphs
,
trees
3200
x388
1366F
Jog Around The Graph
binary search
,
dp
,
geometry
,
graphs
2700
x585
1359F
RC Kaboom Show
binary search
,
brute force
,
data structures
,
geometry
,
math
2900
x346
1354C2
Not So Simple Polygon Embedding
binary search
,
brute force
,
geometry
,
math
2000
x5780
1354C1
Simple Polygon Embedding
binary search
,
geometry
,
math
,
ternary search
1400
x15270
1331E
Jordan Smiley
*special problem
,
dfs and similar
,
geometry
,
implementation
x1194
1326G
Spiderweb Trees
dp
,
geometry
,
trees
3500
x69
1312A
Two Regular Polygons
geometry
,
greedy
,
math
,
number theory
800
x25173
1307B
Cow and Friend
geometry
,
greedy
,
math
1300
x12852
1303G
Sum of Prefix Sums
data structures
,
divide and conquer
,
geometry
,
trees
2700
x699
1299C
Water Balance
data structures
,
geometry
,
greedy
2100
x3553
1299B
Aerodynamic
geometry
1800
x4991
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x5936
1284E
New Year and Castle Construction
combinatorics
,
geometry
,
math
,
sortings
2500
x1030
1271C
Shawarma Tent
brute force
,
geometry
,
greedy
,
implementation
1300
x10166
1270E
Divide Points
constructive algorithms
,
geometry
,
math
2300
x2148
1254C
Point Ordering
constructive algorithms
,
geometry
,
interactive
,
math
2300
x1207
1248A
Integer Points
geometry
,
math
1000
x13712
1237C1
Balanced Removals (Easier)
constructive algorithms
,
geometry
,
greedy
1700
x5839
1220G
Geolocation
geometry
3400
x46
1218B
Guarding warehouses
data structures
,
geometry
3000
x65
1216C
White Sheet
geometry
,
math
1700
x8691
1199B
Water Lily
geometry
,
math
1000
x19463
1195F
Geometers Anonymous Club
data structures
,
geometry
,
math
,
sortings
2500
x664
1194E
Count The Rectangles
bitmasks
,
brute force
,
data structures
,
geometry
,
sortings
2200
x1717
1193C
Scissors and Tape
*special problem
,
constructive algorithms
,
geometry
x35
1175G
Yet Another Partiton Problem
data structures
,
divide and conquer
,
dp
,
geometry
,
two pointers
3000
x410
1167G
Low Budget Inception
brute force
,
geometry
3100
x145
1163C2
Power Transmission (Hard Edition)
data structures
,
geometry
,
implementation
,
math
1900
x3378
1163C1
Power Transmission (Easy Edition)
brute force
,
geometry
1900
x3111
1158D
Winding polygonal line
constructive algorithms
,
geometry
,
greedy
,
math
2600
x656
1156A
Inscribed Figures
geometry
1400
x7919
1146H
Satanic Panic
dp
,
geometry
2900
x415
1142C
U2
geometry
2400
x1148
1100C
NN and the Optical Illusion
binary search
,
geometry
,
math
1200
x9696
1096C
Polygon for the Angle
brute force
,
geometry
1600
x6510
1083E
The Fair Nut and Rectangles
data structures
,
dp
,
geometry
2400
x3680
1071E
Rain Protection
binary search
,
geometry
3500
x88
1070M
Algoland and Berland
constructive algorithms
,
divide and conquer
,
geometry
3000
x63
1064A
Make a triangle!
brute force
,
geometry
,
math
800
x21519
1063C
Dwarves, Hats and Extrasensory Abilities
binary search
,
constructive algorithms
,
geometry
,
interactive
1900
x2772
1059D
Nature Reserve
binary search
,
geometry
,
ternary search
2200
x2525
1047B
Cover Points
geometry
,
math
900
x16691
1046I
Say Hello
geometry
2300
x301
1045F
Shady Lady
geometry
,
math
3400
x90
1045E
Ancient civilizations
constructive algorithms
,
geometry
3200
x117
1044C
Optimal Polygon Perimeter
dp
,
geometry
2100
x1197
1036E
Covered Points
fft
,
geometry
,
number theory
2400
x1397
1032D
Barcelonian Distance
geometry
,
implementation
1900
x2617
1030D
Vasya and Triangle
geometry
,
number theory
1800
x5656
1030B
Vasya and Cornfield
geometry
1100
x11765
1028C
Rectangles
geometry
,
implementation
,
sortings
1600
x4301
1025F
Disjoint Triangles
geometry
2700
x629
1019D
Large Triangle
binary search
,
geometry
,
sortings
2700
x611
1017E
The Supersonic Rocket
geometry
,
hashing
,
strings
2400
x804
1016E
Rest In The Shades
binary search
,
geometry
2400
x903
995C
Leaving the Bar
brute force
,
data structures
,
geometry
,
greedy
,
math
,
sortings
2300
x1673
993C
Careful Maneuvering
bitmasks
,
brute force
,
geometry
2100
x1475
993A
Two Squares
geometry
,
implementation
1600
x3863
989E
A Trance of Nightfall
dp
,
geometry
,
matrices
,
probabilities
2700
x226
989D
A Shade of Moonlight
binary search
,
geometry
,
math
,
sortings
,
two pointers
2500
x501
982E
Billiard
geometry
,
number theory
2600
x681
975E
Hag's Khashba
geometry
2600
x299
975D
Ghosts
geometry
,
math
2000
x1862
962G
Visible Black Areas
data structures
,
dsu
,
geometry
,
trees
2800
x124
961D
Pair Of Lines
geometry
2000
x4071
958E3
Guard Duty (hard)
geometry
2700
x175
958E1
Guard Duty (easy)
brute force
,
geometry
,
greedy
,
math
1600
x1462
949F
Astronomy
geometry
,
probabilities
3300
x56
935C
Fifa and Fafa
geometry
1600
x4618
933C
A Colourful Prospect
geometry
,
graphs
2700
x546
932F
Escape Through Leaf
data structures
,
dp
,
geometry
2700
x2429
908C
New Year and Curling
brute force
,
geometry
,
implementation
,
math
1500
x6644
900A
Find Extra One
geometry
,
implementation
800
x13187
887E
Little Brother
binary search
,
geometry
,
sortings
2800
x161
886F
Symmetric Projections
geometry
2900
x262
859B
Lazy Security Guard
brute force
,
geometry
,
math
1000
x6714
853E
Lada Malina
data structures
,
geometry
3400
x63
852H
Bob and stages
dp
,
geometry
3000
x142
851B
Arpa and an exam about geometry
geometry
,
math
1400
x5398
850A
Five Dimensional Points
brute force
,
geometry
,
math
1700
x2990
849B
Tell Your World
brute force
,
geometry
1600
x3465
848B
Rooter's Song
constructive algorithms
,
data structures
,
geometry
,
implementation
,
sortings
,
two pointers
1900
x1809
842B
Gleb And Pizza
geometry
1100
x9951
820B
Mister B and Angle in Polygon
constructive algorithms
,
geometry
,
math
1300
x5075
815D
Karen and Cards
binary search
,
combinatorics
,
data structures
,
geometry
2800
x588
814D
An overnight dance in discotheque
dfs and similar
,
dp
,
geometry
,
greedy
,
trees
2000
x2118
799G
Cut the pie
binary search
,
data structures
,
geometry
3500
x105
794B
Cutting Carrot
geometry
,
math
1200
x6294
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