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CodeTON Round 8 (Div. 1 + Div. 2, Rated, Prizes!)
29:43:38
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Difficulty:
—
dp
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
839D
Winter is here
combinatorics
,
dp
,
math
,
number theory
2200
x2663
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x15682
838E
Convex Countour
dp
2300
x321
838C
Future Failure
dp
,
games
2800
x274
837D
Round Subset
dp
,
math
2100
x4707
835F
Roads in the Kingdom
dfs and similar
,
dp
,
graphs
,
trees
2500
x980
835D
Palindromic characteristics
brute force
,
dp
,
hashing
,
strings
1900
x3861
835C
Star sky
dp
,
implementation
1600
x7594
833E
Caramel Clouds
data structures
,
dp
,
sortings
3400
x208
833B
The Bakery
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2200
x4398
830E
Perpetual Motion Machine
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
,
trees
3100
x271
830D
Singer House
combinatorics
,
dp
,
graphs
,
trees
2800
x789
830A
Office Keys
binary search
,
brute force
,
dp
,
greedy
,
sortings
1800
x6470
827F
Dirty Arkady's Kitchen
data structures
,
dp
,
graphs
,
shortest paths
3200
x378
825F
String Compression
dp
,
hashing
,
string suffix structures
,
strings
2400
x1270
822E
Liar
binary search
,
dp
,
hashing
,
string suffix structures
2400
x731
822D
My pretty girl Noora
brute force
,
dp
,
greedy
,
math
,
number theory
1800
x2940
821E
Okabe and El Psy Kongroo
dp
,
matrices
2100
x1401
817C
Really Big Numbers
binary search
,
brute force
,
dp
,
math
1600
x6936
815C
Karen and Supermarket
brute force
,
dp
,
trees
2400
x2427
814E
An unavoidable detour for home
combinatorics
,
dp
,
graphs
,
shortest paths
2600
x636
814D
An overnight dance in discotheque
dfs and similar
,
dp
,
geometry
,
greedy
,
trees
2000
x2118
814C
An impassioned circulation of affection
brute force
,
dp
,
strings
,
two pointers
1600
x6245
813D
Two Melodies
dp
,
flows
2600
x944
812B
Sagheer, the Hausmeister
bitmasks
,
brute force
,
dp
1600
x5054
811C
Vladik and Memorable Trip
dp
,
implementation
1900
x3190
809D
Hitchhiking in the Baltic States
data structures
,
dp
2900
x745
809C
Find a car
combinatorics
,
divide and conquer
,
dp
2600
x722
808G
Anthem of Berland
dp
,
strings
2300
x2357
808E
Selling Souvenirs
binary search
,
dp
,
greedy
,
ternary search
2300
x1743
804F
Fake bullions
combinatorics
,
dfs and similar
,
dp
,
graphs
,
number theory
3400
x135
804D
Expected diameter of a tree
binary search
,
brute force
,
dfs and similar
,
dp
,
sortings
,
trees
2500
x1248
803E
Roma and Poker
dp
,
graphs
2000
x2078
802L
Send the Fool Further! (hard)
dfs and similar
,
dp
,
math
,
trees
2400
x275
802K
Send the Fool Further! (medium)
dp
,
trees
2100
x574
799D
Field expansion
brute force
,
dp
,
meet-in-the-middle
2100
x1964
798C
Mike and gcd problem
dp
,
greedy
,
number theory
1700
x5555
798B
Mike and strings
brute force
,
dp
,
strings
1300
x8241
797F
Mice and Holes
data structures
,
dp
,
greedy
,
sortings
2600
x1066
797E
Array Queries
brute force
,
data structures
,
dp
2000
x3993
797B
Odd sum
dp
,
greedy
,
implementation
1400
x10094
796E
Exam Cheating
binary search
,
dp
2400
x614
796D
Police Stations
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
2100
x5036
796C
Bank Hacking
constructive algorithms
,
data structures
,
dp
,
trees
1900
x2956
794G
Replace All
combinatorics
,
dp
,
math
3400
x316
793F
Julia the snail
data structures
,
divide and conquer
,
dp
3000
x498
793E
Problem of offices
constructive algorithms
,
dfs and similar
,
dp
,
trees
2900
x238
793D
Presents in Bankopolis
dp
,
graphs
,
shortest paths
2100
x1566
792C
Divide by Three
dp
,
greedy
,
math
,
number theory
2000
x4142
788A
Functions again
dp
,
two pointers
1600
x8916
786A
Berzerk
dfs and similar
,
dp
,
games
2000
x2295
785D
Anton and School - 2
combinatorics
,
dp
,
math
,
number theory
2300
x2616
780G
Andryusha and Nervous Barriers
data structures
,
dp
2700
x639
780F
Axel and Marston in Bitland
bitmasks
,
dp
,
graphs
,
matrices
2400
x1014
778E
Selling Numbers
dp
,
sortings
3000
x294
777E
Hanoi Factory
brute force
,
data structures
,
dp
,
greedy
,
sortings
2000
x3834
777C
Alyona and Spreadsheet
binary search
,
data structures
,
dp
,
greedy
,
implementation
,
two pointers
1600
x6248
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9293
776G
Sherlock and the Encrypted Data
bitmasks
,
combinatorics
,
dp
2900
x325
774J
Stepan's Series
*special problem
,
dp
2000
x343
774I
Composing Of String
*special problem
,
dp
2300
x97
773F
Test Data Generation
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3400
x177
773D
Perishable Roads
dp
,
graphs
,
shortest paths
2700
x557
772D
Varying Kibibits
bitmasks
,
dp
2700
x562
772C
Vulnerable Kerbals
constructive algorithms
,
dp
,
graphs
,
math
,
number theory
2300
x1179
771E
Bear and Rectangle Strips
dp
,
greedy
3000
x435
771D
Bear and Company
dp
2500
x1099
771C
Bear and Tree Jumps
dfs and similar
,
dp
,
trees
2100
x2768
768E
Game of Stones
bitmasks
,
dp
,
games
2100
x2609
768D
Jon and Orbs
dp
,
math
,
probabilities
2200
x2716
768C
Jon Snow and his Favourite Number
brute force
,
dp
,
implementation
,
sortings
1800
x3760
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2769
766D
Mahmoud and a Dictionary
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
2000
x3222
766C
Mahmoud and a Message
brute force
,
dp
,
greedy
,
strings
1700
x4299
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x73
765E
Tree Folding
dfs and similar
,
dp
,
greedy
,
implementation
,
trees
2200
x1243
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10022
762D
Maximum path
dp
,
greedy
,
implementation
2300
x1280
761F
Dasha and Photos
brute force
,
data structures
,
dp
,
implementation
2600
x399
761C
Dasha and Password
brute force
,
dp
,
implementation
1500
x5803
758E
Broken Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x437
758D
Ability To Convert
constructive algorithms
,
dp
,
greedy
,
math
,
strings
2000
x2678
757E
Bash Plays with Functions
brute force
,
combinatorics
,
dp
,
number theory
2500
x1254
757D
Felicity's Big Secret Revealed
bitmasks
,
dp
2200
x1263
756E
Byteland coins
combinatorics
,
dp
,
math
3200
x149
756D
Bacterial Melee
brute force
,
combinatorics
,
dp
,
string suffix structures
2400
x967
756B
Travel Card
binary search
,
dp
1600
x3282
755G
PolandBall and Many Other Balls
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3200
x832
755F
PolandBall and Gifts
bitmasks
,
dp
,
greedy
2600
x1223
754C
Vladik and chat
brute force
,
constructive algorithms
,
dp
,
implementation
,
strings
2200
x892
753A
Santa Claus and Candies
dp
,
greedy
,
math
1000
x8722
750G
New Year and Binary Tree Paths
bitmasks
,
brute force
,
combinatorics
,
dp
3200
x437
750E
New Year and Old Subsequence
data structures
,
divide and conquer
,
dp
,
matrices
2600
x1459
750D
New Year and Fireworks
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
1900
x3049
747F
Igor and Interesting Numbers
brute force
,
combinatorics
,
dp
,
math
2500
x407
747D
Winter Is Coming
dp
,
greedy
,
sortings
1800
x2938
744C
Hongcow Buys a Deck of Cards
bitmasks
,
brute force
,
dp
2400
x979
743E
Vladik and cards
binary search
,
bitmasks
,
brute force
,
dp
2200
x1443
743D
Chloe and pleasant prizes
dfs and similar
,
dp
,
graphs
,
trees
1800
x4230
741B
Arpa's weak amphitheater and Mehrdad's valuable Hoses
dfs and similar
,
dp
,
dsu
1600
x5102
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