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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
09:25:29
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math
combine-tags-by-or
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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
900C
Remove Extra One
brute force
,
data structures
,
math
1700
x4578
900B
Position in Fraction
math
,
number theory
1300
x7866
899D
Shovel Sale
constructive algorithms
,
math
1800
x2769
899C
Dividing the numbers
constructive algorithms
,
graphs
,
math
1300
x8506
899A
Splitting in Teams
constructive algorithms
,
greedy
,
math
800
x10265
898F
Restoring the Expression
brute force
,
hashing
,
math
2300
x1198
898A
Rounding
implementation
,
math
800
x16296
896D
Nephren Runs a Cinema
chinese remainder theorem
,
combinatorics
,
math
,
number theory
2900
x537
895D
String Mark
combinatorics
,
math
,
strings
2100
x1119
895C
Square Subsets
bitmasks
,
combinatorics
,
dp
,
math
2000
x5641
895B
XK Segments
binary search
,
math
,
sortings
,
two pointers
1700
x3557
894C
Marco and GCD Sequence
constructive algorithms
,
math
1900
x4380
894B
Ralph And His Magic Field
combinatorics
,
constructive algorithms
,
math
,
number theory
1800
x4483
893E
Counting Arrays
combinatorics
,
dp
,
math
,
number theory
2000
x3720
891E
Lust
combinatorics
,
math
,
matrices
3000
x940
891A
Pride
brute force
,
dp
,
greedy
,
math
,
number theory
1500
x10308
889E
Mod Mod Mod
binary search
,
dp
,
math
3000
x567
888D
Almost Identity Permutations
combinatorics
,
dp
,
math
1600
x8496
886E
Maximum Element
combinatorics
,
dp
,
math
2400
x1029
884C
Bertown Subway
dfs and similar
,
greedy
,
math
1500
x4748
883M
Quadcopter Competition
greedy
,
math
1100
x3604
883D
Packmen Strike Back
binary search
,
dp
,
math
2500
x442
876B
Divisiblity of Differences
implementation
,
math
,
number theory
1300
x9222
876A
Trip For Meal
math
900
x9404
875A
Classroom Watch
brute force
,
math
1200
x9650
870C
Maximum splitting
dp
,
greedy
,
math
,
number theory
1300
x9232
869C
The Intriguing Obsession
combinatorics
,
dp
,
math
1800
x4730
869B
The Eternal Immortality
math
1100
x13768
868G
El Toll Caves
math
3300
x133
865G
Flowers and Chocolate
combinatorics
,
math
,
matrices
3300
x136
865F
Egg Roulette
bitmasks
,
brute force
,
divide and conquer
,
math
,
meet-in-the-middle
3300
x68
864D
Make a Permutation!
greedy
,
implementation
,
math
1500
x6013
864C
Bus
greedy
,
implementation
,
math
1500
x5866
859G
Circle of Numbers
math
3000
x159
859B
Lazy Security Guard
brute force
,
geometry
,
math
1000
x7066
858A
k-rounding
brute force
,
math
,
number theory
1100
x8094
856C
Eleventh Birthday
combinatorics
,
dp
,
math
2400
x629
854B
Maxim Buys an Apartment
constructive algorithms
,
math
1200
x8200
854A
Fraction
brute force
,
constructive algorithms
,
math
800
x13678
852F
Product transformation
combinatorics
,
math
,
number theory
2200
x578
852A
Digits
brute force
,
implementation
,
math
2500
x389
851B
Arpa and an exam about geometry
geometry
,
math
1400
x5562
851A
Arpa and a research in Mexican wave
implementation
,
math
800
x9792
850F
Rainbow Balls
math
2800
x669
850E
Random Elections
bitmasks
,
brute force
,
divide and conquer
,
fft
,
math
2800
x403
850D
Tournament Construction
constructive algorithms
,
dp
,
graphs
,
greedy
,
math
2800
x393
850A
Five Dimensional Points
brute force
,
geometry
,
math
1700
x3213
848E
Days of Floral Colours
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
3400
x212
847M
Weather Tomorrow
implementation
,
math
1000
x6309
847I
Noise Level
dfs and similar
,
implementation
,
math
1900
x1534
846F
Random Query
data structures
,
math
,
probabilities
,
two pointers
1800
x2283
845G
Shortest Path Problem?
dfs and similar
,
graphs
,
math
2300
x1692
844B
Rectangles
combinatorics
,
math
1300
x7487
843C
Upgrading Tree
constructive algorithms
,
dfs and similar
,
graphs
,
math
,
trees
2600
x361
843A
Sorting by Subsequences
dfs and similar
,
dsu
,
implementation
,
math
,
sortings
1400
x5682
842C
Ilya And The Tree
dfs and similar
,
graphs
,
math
,
number theory
,
trees
2000
x3505
841B
Godsend
games
,
math
1100
x12313
840A
Leha and Function
combinatorics
,
greedy
,
math
,
number theory
,
sortings
1300
x7008
839E
Mother of Dragons
brute force
,
graphs
,
math
,
meet-in-the-middle
2700
x919
839D
Winter is here
combinatorics
,
dp
,
math
,
number theory
2200
x2984
838D
Airplane Arrangements
math
,
number theory
2700
x916
837F
Prefix Sums
binary search
,
brute force
,
combinatorics
,
math
,
matrices
2400
x983
837E
Vasya's Function
binary search
,
implementation
,
math
2100
x1802
837D
Round Subset
dp
,
math
2100
x5653
835A
Key races
math
800
x20346
833C
Ever-Hungry Krakozyabra
brute force
,
combinatorics
,
greedy
,
math
2700
x473
833A
The Meaningless Game
math
,
number theory
1700
x6216
832C
Strange Radiation
binary search
,
implementation
,
math
2500
x453
832A
Sasha and Sticks
games
,
math
800
x20868
830E
Perpetual Motion Machine
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
,
trees
3100
x282
830C
Bamboo Partition
brute force
,
data structures
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2300
x1206
827E
Rusty String
fft
,
math
,
strings
2700
x968
822D
My pretty girl Noora
brute force
,
dp
,
greedy
,
math
,
number theory
1800
x3106
822A
I'm bored with life
implementation
,
math
,
number theory
800
x33424
821B
Okabe and Banana Trees
brute force
,
math
1300
x5783
820B
Mister B and Angle in Polygon
constructive algorithms
,
geometry
,
math
1300
x5269
819B
Mister B and PR Shifts
data structures
,
implementation
,
math
1900
x1707
818F
Level Generation
binary search
,
math
,
ternary search
2100
x1584
818A
Diplomas and Certificates
implementation
,
math
800
x7027
817C
Really Big Numbers
binary search
,
brute force
,
dp
,
math
1600
x7478
817B
Makes And The Product
combinatorics
,
implementation
,
math
,
sortings
1500
x5789
817A
Treasure Hunt
implementation
,
math
,
number theory
1200
x6270
815B
Karen and Test
brute force
,
combinatorics
,
constructive algorithms
,
math
2200
x1382
813B
The Golden Age
brute force
,
math
1800
x4002
810A
Straight <<A>>
implementation
,
math
900
x8851
809E
Surprise me!
divide and conquer
,
math
,
number theory
,
trees
3100
x736
809A
Do you want a date?
implementation
,
math
,
sortings
1500
x4706
808B
Average Sleep Time
data structures
,
implementation
,
math
1300
x7861
805A
Fake NP
greedy
,
math
1000
x18095
804B
Minimum number of steps
combinatorics
,
greedy
,
implementation
,
math
1400
x9691
804A
Find Amir
constructive algorithms
,
greedy
,
math
1000
x15520
803C
Maximal GCD
constructive algorithms
,
greedy
,
math
1900
x5143
802L
Send the Fool Further! (hard)
dfs and similar
,
dp
,
math
,
trees
2400
x314
802F
Marmots (hard)
math
,
probabilities
2800
x128
802E
Marmots (medium)
math
2200
x254
802D
Marmots (easy)
math
2100
x458
797A
k-Factorization
implementation
,
math
,
number theory
1100
x15658
794G
Replace All
combinatorics
,
dp
,
math
3400
x346
794E
Choosing Carrot
games
,
math
2800
x813
794B
Cutting Carrot
geometry
,
math
1200
x6642
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