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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
27:46:00
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→ Filter Problems
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
1662K
Pandemic Restrictions
geometry
,
ternary search
x294
568D
Sign Posts
brute force
,
geometry
,
math
2800
x297
78D
Archer's Shot
binary search
,
geometry
,
math
,
two pointers
2300
x297
98C
Help Greg the Dwarf
geometry
,
ternary search
2500
x298
975E
Hag's Khashba
geometry
2600
x299
1046I
Say Hello
geometry
2300
x301
67E
Save the City!
geometry
2500
x310
32E
Hide-and-Seek
geometry
,
implementation
2400
x317
23D
Tetragon
geometry
,
math
2600
x319
566G
Max and Min
geometry
2500
x331
213D
Stars
constructive algorithms
,
geometry
2300
x332
460E
Roland and Rose
brute force
,
geometry
,
math
,
sortings
2700
x333
1826F
Fading into Fog
geometry
,
interactive
,
math
,
probabilities
2800
x334
100I
Rotation
*special problem
,
geometry
,
math
1500
x334
603D
Ruminations on Ruminants
geometry
,
math
2900
x336
379E
New Year Tree Decorations
geometry
,
schedules
,
sortings
2500
x336
274C
The Last Hole!
brute force
,
geometry
2600
x345
1359F
RC Kaboom Show
binary search
,
brute force
,
data structures
,
geometry
,
math
2900
x346
598F
Cut Length
geometry
2900
x349
47E
Cannon
data structures
,
geometry
,
sortings
2200
x350
1599G
Shortest path
brute force
,
geometry
,
math
,
shortest paths
2700
x354
140F
New Year Snowflake
geometry
,
sortings
2600
x357
77E
Martian Food
geometry
2800
x361
198C
Delivering Carcinogen
binary search
,
geometry
2400
x367
249D
Donkey and Stars
data structures
,
dp
,
geometry
,
math
,
sortings
2700
x371
1920F2
Smooth Sailing (Hard Version)
binary search
,
data structures
,
dsu
,
geometry
,
graphs
,
trees
3000
x381
1388E
Uncle Bogdan and Projections
data structures
,
geometry
,
sortings
2700
x388
1368G
Shifting Dominoes
data structures
,
geometry
,
graphs
,
trees
3200
x392
1866K
Keen Tree Calculation
binary search
,
data structures
,
dp
,
geometry
,
graphs
,
implementation
,
trees
2500
x399
30D
King's Problem?
geometry
,
greedy
2600
x404
776F
Sherlock's bet to Moriarty
constructive algorithms
,
data structures
,
divide and conquer
,
geometry
,
graphs
,
implementation
,
trees
2800
x407
1175G
Yet Another Partiton Problem
data structures
,
divide and conquer
,
dp
,
geometry
,
two pointers
3000
x410
1146H
Satanic Panic
dp
,
geometry
2900
x415
559D
Randomizer
combinatorics
,
geometry
,
probabilities
2800
x418
611G
New Year and Cake
geometry
,
two pointers
2900
x420
377E
Cookie Clicker
dp
,
geometry
2800
x439
681E
Runaway to a Shadow
geometry
,
sortings
2500
x444
1575B
Building an Amusement Park
binary search
,
geometry
2300
x447
1841F
Monocarp and a Strategic Game
geometry
,
sortings
,
two pointers
2700
x462
1468I
Plane Tiling
geometry
,
implementation
,
math
2500
x468
594B
Max and Bike
binary search
,
geometry
2500
x473
698D
Limak and Shooting Points
brute force
,
geometry
,
math
2600
x490
409G
On a plane
*special problem
,
geometry
2200
x490
1715F
Crop Squares
constructive algorithms
,
geometry
,
interactive
,
math
2700
x494
1534G
A New Beginning
data structures
,
dp
,
geometry
,
sortings
3300
x499
989D
A Shade of Moonlight
binary search
,
geometry
,
math
,
sortings
,
two pointers
2500
x501
241C
Mirror Box
geometry
,
implementation
2000
x506
8D
Two Friends
binary search
,
geometry
2600
x508
314D
Sereja and Straight Lines
binary search
,
data structures
,
geometry
,
sortings
,
two pointers
2500
x513
1508D
Swap Pass
constructive algorithms
,
geometry
,
sortings
3000
x520
1444D
Rectangular Polyline
constructive algorithms
,
dp
,
geometry
2900
x530
87E
Mogohu-Rea Idol
geometry
2600
x536
933C
A Colourful Prospect
geometry
,
graphs
2700
x546
1627F
Not Splitting
geometry
,
graphs
,
greedy
,
implementation
,
shortest paths
2700
x549
91E
Igloo Skyscraper
data structures
,
geometry
2500
x582
1765F
Chemistry Lab
dp
,
geometry
,
probabilities
2200
x583
618E
Robot Arm
data structures
,
geometry
2500
x583
1366F
Jog Around The Graph
binary search
,
dp
,
geometry
,
graphs
2700
x586
13D
Triangles
dp
,
geometry
2600
x587
815D
Karen and Cards
binary search
,
combinatorics
,
data structures
,
geometry
2800
x588
1019D
Large Triangle
binary search
,
geometry
,
sortings
2700
x611
1025F
Disjoint Triangles
geometry
2700
x629
1776I
Spinach Pizza
games
,
geometry
,
greedy
,
interactive
2500
x632
682E
Alyona and Triangles
geometry
,
two pointers
2600
x642
1158D
Winding polygonal line
constructive algorithms
,
geometry
,
greedy
,
math
2600
x656
1195F
Geometers Anonymous Club
data structures
,
geometry
,
math
,
sortings
2500
x664
55E
Very simple problem
geometry
,
two pointers
2500
x670
183B
Zoo
brute force
,
geometry
1700
x671
982E
Billiard
geometry
,
number theory
2600
x681
437E
The Child and Polygon
dp
,
geometry
2500
x686
1303G
Sum of Prefix Sums
data structures
,
divide and conquer
,
geometry
,
trees
2700
x700
630O
Arrow
geometry
2000
x720
50C
Happy Farm 5
geometry
2000
x723
196C
Paint Tree
constructive algorithms
,
divide and conquer
,
geometry
,
sortings
,
trees
2200
x737
65C
Harry Potter and the Golden Snitch
binary search
,
geometry
2100
x769
277B
Set of Points
constructive algorithms
,
geometry
2300
x772
199B
Special Olympics
geometry
1900
x772
13B
Letter A
geometry
,
implementation
2000
x776
683A
The Check of the Point
*special problem
,
geometry
1200
x782
535E
Tavas and Pashmaks
geometry
,
math
2600
x782
1519E
Off by One
constructive algorithms
,
dfs and similar
,
geometry
,
graphs
,
sortings
,
trees
2700
x787
1468G
Hobbits
binary search
,
geometry
2500
x790
248C
Robo-Footballer
binary search
,
geometry
2000
x792
385D
Bear and Floodlight
bitmasks
,
dp
,
geometry
2200
x793
1017E
The Supersonic Rocket
geometry
,
hashing
,
strings
2400
x804
1949I
Disks
dfs and similar
,
geometry
,
graph matchings
,
graphs
x815
678F
Lena and Queries
data structures
,
divide and conquer
,
geometry
2500
x821
106E
Space Rescuers
geometry
,
ternary search
2100
x827
250D
Building Bridge
geometry
,
ternary search
,
two pointers
1900
x872
1394C
Boboniu and String
binary search
,
geometry
,
ternary search
2600
x892
85E
Guard Towers
binary search
,
dsu
,
geometry
,
graphs
,
sortings
2600
x893
1536F
Omkar and Akmar
chinese remainder theorem
,
combinatorics
,
constructive algorithms
,
fft
,
games
,
geometry
,
math
,
meet-in-the-middle
,
string suffix structures
2600
x901
1016E
Rest In The Shades
binary search
,
geometry
2400
x903
120J
Minimum Sum
divide and conquer
,
geometry
,
sortings
1900
x904
70D
Professor's task
data structures
,
geometry
2700
x914
195D
Analyzing Polyline
geometry
,
math
,
sortings
1900
x995
1924C
Fractal Origami
geometry
,
math
,
matrices
2400
x1001
1284E
New Year and Castle Construction
combinatorics
,
geometry
,
math
,
sortings
2500
x1030
630P
Area of a Star
geometry
2100
x1050
333E
Summer Earnings
binary search
,
bitmasks
,
brute force
,
geometry
,
sortings
2500
x1063
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