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Before contest
Codeforces Round 940 (Div. 2) and CodeCraft-23
42:02:22
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→ Filter Problems
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
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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Status
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Custom test
Problems
#
Name
1776B
Vittorio Plays with LEGO Bricks
dp
,
geometry
2200
x1236
1666I
Interactive Treasure Hunt
brute force
,
constructive algorithms
,
geometry
,
interactive
,
math
2200
x1377
1194E
Count The Rectangles
bitmasks
,
brute force
,
data structures
,
geometry
,
sortings
2200
x1727
1477C
Nezzar and Nice Beatmap
constructive algorithms
,
geometry
,
greedy
,
math
,
sortings
2200
x2194
1736D
Equal Binary Subsequences
constructive algorithms
,
geometry
,
greedy
,
implementation
,
strings
2200
x2382
1059D
Nature Reserve
binary search
,
geometry
,
ternary search
2200
x2536
429D
Tricky Function
data structures
,
divide and conquer
,
geometry
2200
x2571
530H
Points in triangle
*special problem
,
geometry
2100
x119
65C
Harry Potter and the Golden Snitch
binary search
,
geometry
2100
x771
106E
Space Rescuers
geometry
,
ternary search
2100
x833
630P
Area of a Star
geometry
2100
x1054
1044C
Optimal Polygon Perimeter
dp
,
geometry
2100
x1198
993C
Careful Maneuvering
bitmasks
,
brute force
,
geometry
2100
x1477
703C
Chris and Road
geometry
,
implementation
2100
x1579
590B
Chip 'n Dale Rescue Rangers
binary search
,
geometry
,
math
2100
x1692
340B
Maximal Area Quadrilateral
brute force
,
geometry
2100
x2016
166B
Polygons
geometry
,
sortings
2100
x2115
1710B
Rain
binary search
,
brute force
,
data structures
,
geometry
,
greedy
,
implementation
,
math
2100
x2344
763B
Timofey and rectangles
constructive algorithms
,
geometry
2100
x2572
576C
Points on Plane
constructive algorithms
,
divide and conquer
,
geometry
,
greedy
,
sortings
2100
x3212
1299C
Water Balance
data structures
,
geometry
,
greedy
2100
x3607
319C
Kalila and Dimna in the Logging Industry
dp
,
geometry
2100
x4702
1C
Ancient Berland Circus
geometry
,
math
2100
x5359
241C
Mirror Box
geometry
,
implementation
2000
x506
630O
Arrow
geometry
2000
x721
50C
Happy Farm 5
geometry
2000
x724
13B
Letter A
geometry
,
implementation
2000
x779
248C
Robo-Footballer
binary search
,
geometry
2000
x792
33D
Knights
geometry
,
graphs
,
shortest paths
,
sortings
2000
x1126
280A
Rectangle Puzzle
geometry
2000
x1440
1725C
Circular Mirror
binary search
,
combinatorics
,
geometry
,
math
,
two pointers
2000
x1529
464B
Restore Cube
brute force
,
geometry
2000
x1657
689E
Mike and Geometry Problem
combinatorics
,
data structures
,
dp
,
geometry
,
implementation
2000
x1801
975D
Ghosts
geometry
,
math
2000
x1867
814D
An overnight dance in discotheque
dfs and similar
,
dp
,
geometry
,
greedy
,
trees
2000
x2123
600D
Area of Two Circles' Intersection
geometry
2000
x2127
474C
Captain Marmot
brute force
,
geometry
2000
x3055
961D
Pair Of Lines
geometry
2000
x4088
1354C2
Not So Simple Polygon Embedding
binary search
,
brute force
,
geometry
,
math
2000
x5797
199B
Special Olympics
geometry
1900
x774
250D
Building Bridge
geometry
,
ternary search
,
two pointers
1900
x873
120J
Minimum Sum
divide and conquer
,
geometry
,
sortings
1900
x906
195D
Analyzing Polyline
geometry
,
math
,
sortings
1900
x996
848B
Rooter's Song
constructive algorithms
,
data structures
,
geometry
,
implementation
,
sortings
,
two pointers
1900
x1810
342C
Cupboard and Balloons
geometry
1900
x1814
1032D
Barcelonian Distance
geometry
,
implementation
1900
x2621
1063C
Dwarves, Hats and Extrasensory Abilities
binary search
,
constructive algorithms
,
geometry
,
interactive
1900
x2782
1163C1
Power Transmission (Easy Edition)
brute force
,
geometry
1900
x3153
613A
Peter and Snow Blower
binary search
,
geometry
,
ternary search
1900
x3177
1819B
The Butcher
geometry
,
greedy
,
implementation
,
sortings
,
two pointers
1900
x3402
1163C2
Power Transmission (Hard Edition)
data structures
,
geometry
,
implementation
,
math
1900
x3427
660D
Number of Parallelograms
geometry
1900
x3799
1689D
Lena and Matrix
data structures
,
dp
,
geometry
,
shortest paths
1900
x4014
552D
Vanya and Triangles
brute force
,
combinatorics
,
data structures
,
geometry
,
math
,
sortings
1900
x4341
630M
Turn
geometry
,
math
1800
x1092
24C
Sequence of points
geometry
,
implementation
,
math
1800
x1207
452B
4-point polyline
brute force
,
constructive algorithms
,
geometry
,
trees
1800
x1973
190B
Surrounded
geometry
1800
x2783
1666C
Connect the Points
brute force
,
constructive algorithms
,
geometry
1800
x3067
772B
Volatile Kite
geometry
1800
x3090
671A
Recycling Bottles
dp
,
geometry
,
greedy
,
implementation
1800
x4104
257C
View Angle
brute force
,
geometry
,
math
1800
x4183
1299B
Aerodynamic
geometry
1800
x5023
1030D
Vasya and Triangle
geometry
,
number theory
1800
x5669
1552C
Maximize the Intersections
combinatorics
,
constructive algorithms
,
geometry
,
greedy
,
sortings
1800
x5764
183B
Zoo
brute force
,
geometry
1700
x677
630Q
Pyramids
geometry
,
math
1700
x1207
203D
Hit Ball
geometry
,
implementation
,
math
1700
x1398
850A
Five Dimensional Points
brute force
,
geometry
,
math
1700
x2992
14C
Four Segments
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3036
581D
Three Logos
bitmasks
,
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3407
1468F
Full Turn
geometry
,
hashing
,
number theory
1700
x3582
140A
New Year Table
geometry
,
math
1700
x4078
578A
A Problem about Polyline
geometry
,
math
1700
x4683
1670D
Very Suspicious
binary search
,
brute force
,
geometry
,
greedy
,
implementation
,
math
1700
x4935
1942C2
Bessie's Birthday Cake (Hard Version)
geometry
,
greedy
,
math
1700
x5229
1237C1
Balanced Removals (Easier)
constructive algorithms
,
geometry
,
greedy
1700
x5853
1934C
Find a Mine
binary search
,
constructive algorithms
,
geometry
,
greedy
,
interactive
,
math
1700
x5898
1292B
Aroma's Search
brute force
,
constructive algorithms
,
geometry
,
greedy
,
implementation
1700
x6006
498A
Crazy Town
geometry
1700
x6328
1916D
Mathematical Problem
brute force
,
constructive algorithms
,
geometry
,
math
1700
x7802
1598D
Training Session
combinatorics
,
data structures
,
geometry
,
implementation
,
math
1700
x8370
1216C
White Sheet
geometry
,
math
1700
x8748
1451D
Circle Game
games
,
geometry
,
math
1700
x9229
1550C
Manhattan Subarrays
brute force
,
geometry
,
greedy
,
implementation
1700
x9913
958E1
Guard Duty (easy)
brute force
,
geometry
,
greedy
,
math
1600
x1466
135B
Rectangle and Square
brute force
,
geometry
,
math
1600
x2289
849B
Tell Your World
brute force
,
geometry
1600
x3469
993A
Two Squares
geometry
,
implementation
1600
x3872
593B
Anton and Lines
geometry
,
sortings
1600
x3938
231D
Magic Box
brute force
,
geometry
1600
x4024
618C
Constellation
geometry
,
implementation
1600
x4160
1028C
Rectangles
geometry
,
implementation
,
sortings
1600
x4311
935C
Fifa and Fafa
geometry
1600
x4626
407A
Triangle
brute force
,
geometry
,
implementation
,
math
1600
x4737
1096C
Polygon for the Angle
brute force
,
geometry
1600
x6658
559A
Gerald's Hexagon
brute force
,
geometry
,
math
1600
x10272
1730B
Meeting on the Line
binary search
,
geometry
,
greedy
,
implementation
,
math
,
ternary search
1600
x11749
100I
Rotation
*special problem
,
geometry
,
math
1500
x337
1725G
Garage
binary search
,
geometry
,
math
1500
x5569
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