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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
32:14:12
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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
1437B
Reverse Binary Strings
constructive algorithms
,
greedy
1200
x18581
1437A
Marketing Scheme
brute force
,
constructive algorithms
,
greedy
,
math
800
x17798
1436F
Sum Over Subsets
combinatorics
,
math
,
number theory
2800
x478
1436E
Complicated Computations
binary search
,
data structures
,
two pointers
2400
x2090
1436D
Bandit in a City
binary search
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x5801
1436C
Binary Search
binary search
,
combinatorics
1500
x10473
1436B
Prime Square
constructive algorithms
,
math
900
x20107
1436A
Reorder
math
800
x22347
1434E
A Convex Game
dsu
,
games
3500
x156
1433G
Reducing Delivery Cost
brute force
,
graphs
,
shortest paths
2100
x4064
1433F
Zero Remainder Sum
dp
2100
x5789
1433E
Two Round Dances
combinatorics
,
math
1300
x17916
1433D
Districts Connection
constructive algorithms
,
dfs and similar
1200
x21472
1433C
Dominant Piranha
constructive algorithms
,
greedy
900
x26171
1433B
Yet Another Bookshelf
greedy
,
implementation
800
x27842
1433A
Boring Apartments
implementation
,
math
800
x48615
1431J
Zero-XOR Array
*special problem
,
dp
3400
x41
1431I
Cyclic Shifts
*special problem
,
strings
2900
x41
1431H
Rogue-like Game
*special problem
,
brute force
,
greedy
,
two pointers
2600
x63
1431G
Number Deletion Game
*special problem
,
dp
,
games
,
greedy
2100
x137
1431F
Neural Network Problem
*special problem
,
binary search
,
greedy
2100
x152
1431E
Chess Match
*special problem
2000
x214
1431D
Used Markers
*special problem
,
greedy
1500
x444
1431C
Black Friday
*special problem
,
implementation
1600
x690
1431B
Polycarp and the Language of Gods
*special problem
,
implementation
,
two pointers
1400
x994
1431A
Selling Hamburgers
*special problem
800
x1770
1430G
Yet Another DAG Problem
bitmasks
,
dfs and similar
,
dp
,
flows
,
graphs
,
math
2600
x597
1430F
Realistic Gameplay
dp
,
greedy
2600
x852
1430E
String Reversal
data structures
,
greedy
,
strings
1900
x6114
1430D
String Deletion
binary search
,
data structures
,
greedy
,
two pointers
1700
x8627
1430C
Numbers on Whiteboard
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
1000
x23112
1430B
Barrels
greedy
,
implementation
,
sortings
800
x19073
1430A
Number of Apartments
brute force
,
constructive algorithms
,
math
900
x20382
1428H
Rotary Laser Lock
binary search
,
interactive
3500
x82
1428G2
Lucky Numbers (Hard Version)
dp
,
greedy
3000
x593
1428G1
Lucky Numbers (Easy Version)
dp
,
greedy
2900
x538
1428F
Fruit Sequences
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2400
x2147
1428E
Carrots for Rabbits
binary search
,
data structures
,
greedy
,
math
,
sortings
2200
x3468
1428D
Bouncing Boomerangs
constructive algorithms
,
greedy
,
implementation
1900
x4386
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x19519
1428B
Belted Rooms
graphs
,
implementation
1200
x14120
1428A
Box is Pull
math
800
x16126
1427H
Prison Break
binary search
,
games
,
geometry
,
ternary search
3500
x66
1427G
One Billion Shades of Grey
flows
,
graphs
3300
x255
1427F
Boring Card Game
data structures
,
greedy
,
trees
3200
x297
1427E
Xum
bitmasks
,
constructive algorithms
,
math
,
matrices
,
number theory
2500
x1251
1427D
Unshuffling a Deck
constructive algorithms
,
implementation
2000
x3351
1427C
The Hard Work of Paparazzi
dp
2000
x5440
1427B
Chess Cheater
greedy
,
implementation
,
sortings
1400
x10643
1427A
Avoiding Zero
math
,
sortings
900
x16760
1426F
Number of Subsequences
combinatorics
,
dp
,
strings
2000
x5041
1426E
Rock, Paper, Scissors
brute force
,
constructive algorithms
,
flows
,
greedy
,
math
1800
x7178
1426D
Non-zero Segments
constructive algorithms
,
data structures
,
greedy
,
sortings
1500
x15340
1426C
Increase and Copy
binary search
,
constructive algorithms
,
math
1100
x18940
1426B
Symmetric Matrix
implementation
900
x20273
1426A
Floor Number
implementation
,
math
800
x44925
1425I
Impressive Harvesting of The Orchard
data structures
2800
x224
1425H
Huge Boxes of Animal Toys
constructive algorithms
1300
x4065
1425F
Flamingoes of Mystery
interactive
1400
x5053
1425E
Excitation of Atoms
greedy
,
implementation
2200
x899
1425D
Danger of Mad Snakes
combinatorics
,
dp
,
math
2300
x792
1425C
Captain of Knights
math
3100
x36
1425B
Blue and Red of Our Faculty!
divide and conquer
,
dp
2600
x271
1425A
Arena of Greed
games
,
greedy
1400
x6306
1424M
Ancient Language
graphs
,
sortings
2200
x517
1424G
Years
data structures
,
sortings
1300
x5599
1423N
BubbleSquare Tokens
3500
x141
1423M
Milutin's Plums
interactive
2800
x128
1423L
Light switches
meet-in-the-middle
2600
x420
1423K
Lonely Numbers
binary search
,
math
,
number theory
,
two pointers
1600
x4621
1423J
Bubble Cup hypothesis
bitmasks
,
constructive algorithms
,
dp
,
math
2400
x718
1423I
Lookup Tables
bitmasks
3000
x99
1423H
Virus
data structures
,
divide and conquer
,
dsu
,
graphs
2500
x493
1423G
Growing flowers
data structures
3500
x169
1423F
Coins
math
2700
x355
1423E
5G Antenna Towers
geometry
2700
x70
1423D
Does anyone else hate the wind?
3100
x34
1423C
Dušan's Railway
divide and conquer
,
graphs
,
trees
3500
x123
1423B
Valuable Paper
binary search
,
flows
,
graph matchings
,
graphs
1900
x1733
1423A
Wakanda Forever
3500
x65
1422F
Boring Queries
data structures
,
math
,
number theory
2700
x949
1422E
Minlexes
dp
,
greedy
,
implementation
,
strings
2700
x717
1422D
Returning Home
graphs
,
shortest paths
,
sortings
2300
x2569
1422C
Bargain
combinatorics
,
dp
,
math
1700
x8034
1422B
Nice Matrix
greedy
,
implementation
,
math
1300
x14123
1422A
Fence
geometry
,
math
800
x20574
1421E
Swedish Heroes
brute force
,
dp
,
implementation
2700
x666
1421D
Hexagons
brute force
,
constructive algorithms
,
greedy
,
implementation
,
math
,
shortest paths
1900
x4039
1421C
Palindromifier
constructive algorithms
,
strings
1400
x12428
1421B
Putting Bricks in the Wall
constructive algorithms
,
implementation
1100
x12862
1421A
XORwice
bitmasks
,
greedy
,
math
800
x26685
1420E
Battle Lemmings
dp
,
greedy
2500
x835
1420D
Rescue Nibel!
combinatorics
,
data structures
,
sortings
1800
x7264
1420C2
Pokémon Army (hard version)
data structures
,
divide and conquer
,
dp
,
greedy
,
implementation
2100
x4467
1420C1
Pokémon Army (easy version)
constructive algorithms
,
dp
,
greedy
1300
x16920
1420B
Rock and Lever
bitmasks
,
math
1200
x23086
1420A
Cubes Sorting
math
,
sortings
900
x22716
1419F
Rain of Fire
binary search
,
data structures
,
dfs and similar
,
dsu
,
graphs
,
implementation
2800
x471
1419E
Decryption
constructive algorithms
,
implementation
,
math
,
number theory
2100
x3116
1419D2
Sage's Birthday (hard version)
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
,
two pointers
1500
x14522
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