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Codeforces Round 946 (Div. 3)
3 days
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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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Custom test
Problems
#
Name
850A
Five Dimensional Points
brute force
,
geometry
,
math
1700
x2996
849B
Tell Your World
brute force
,
geometry
1600
x3498
849A
Odds and Ends
implementation
1000
x8937
848E
Days of Floral Colours
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
3400
x201
848D
Shake It!
combinatorics
,
dp
,
flows
,
graphs
2900
x365
848C
Goodbye Souvenir
data structures
,
divide and conquer
2600
x1251
848B
Rooter's Song
constructive algorithms
,
data structures
,
geometry
,
implementation
,
sortings
,
two pointers
1900
x1814
848A
From Y to Y
constructive algorithms
1600
x5025
847M
Weather Tomorrow
implementation
,
math
1000
x6186
847L
Berland SU Computer Network
constructive algorithms
,
dfs and similar
,
graphs
,
hashing
,
trees
2400
x315
847K
Travel Cards
greedy
,
implementation
,
sortings
1800
x1495
847J
Students Initiation
binary search
,
flows
,
graphs
2400
x615
847I
Noise Level
dfs and similar
,
implementation
,
math
1900
x1504
847H
Load Testing
greedy
1600
x2371
847G
University Classes
implementation
900
x6528
847F
Berland Elections
greedy
,
sortings
2100
x848
847E
Packmen
binary search
,
dp
1800
x2744
847D
Dog Show
constructive algorithms
,
data structures
,
greedy
2200
x1015
847C
Sum of Nestings
constructive algorithms
1800
x2331
847B
Preparing for Merge Sort
binary search
,
data structures
1600
x4662
847A
Union of Doubly Linked Lists
implementation
1500
x3299
846F
Random Query
data structures
,
math
,
probabilities
,
two pointers
1800
x2205
846E
Chemistry in Berland
dfs and similar
,
greedy
,
trees
2300
x851
846D
Monitor
binary search
,
data structures
1900
x2354
846C
Four Segments
brute force
,
data structures
,
dp
1800
x2614
846B
Math Show
brute force
,
greedy
1800
x2454
846A
Curriculum Vitae
brute force
,
implementation
1500
x4165
845G
Shortest Path Problem?
dfs and similar
,
graphs
,
math
2300
x1500
845F
Guards In The Storehouse
bitmasks
,
dp
2500
x421
845E
Fire in the City
binary search
,
data structures
2400
x579
845D
Driving Test
data structures
,
dp
,
greedy
1800
x2333
845C
Two TVs
data structures
,
greedy
,
sortings
1500
x7909
845B
Luba And The Ticket
brute force
,
greedy
,
implementation
1600
x4941
845A
Chess Tourney
implementation
,
sortings
1100
x7633
844B
Rectangles
combinatorics
,
math
1300
x6995
844A
Diversity
greedy
,
implementation
,
strings
1000
x10422
843E
Maximum Flow
flows
,
graphs
3000
x282
843D
Dynamic Shortest Path
graphs
,
shortest paths
3400
x757
843C
Upgrading Tree
constructive algorithms
,
dfs and similar
,
graphs
,
math
,
trees
2600
x346
843B
Interactive LowerBound
brute force
,
interactive
,
probabilities
2000
x2143
843A
Sorting by Subsequences
dfs and similar
,
dsu
,
implementation
,
math
,
sortings
1400
x5559
842E
Nikita and game
binary search
,
dfs and similar
,
divide and conquer
,
graphs
,
trees
2800
x397
842D
Vitya and Strange Lesson
binary search
,
data structures
2000
x3229
842C
Ilya And The Tree
dfs and similar
,
graphs
,
math
,
number theory
,
trees
2000
x3416
842B
Gleb And Pizza
geometry
1100
x10065
842A
Kirill And The Game
brute force
,
two pointers
1200
x9968
841B
Godsend
games
,
math
1100
x11979
841A
Generous Kefa
brute force
,
implementation
900
x12936
840E
In a Trap
trees
3200
x433
840D
Destiny
data structures
,
probabilities
2500
x2792
840C
On the Bench
combinatorics
,
dp
2500
x1647
840B
Leha and another game about graph
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
graphs
2100
x2246
840A
Leha and Function
combinatorics
,
greedy
,
math
,
number theory
,
sortings
1300
x6956
839E
Mother of Dragons
brute force
,
graphs
,
math
,
meet-in-the-middle
2700
x887
839D
Winter is here
combinatorics
,
dp
,
math
,
number theory
2200
x2695
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x15945
839B
Game of the Rows
brute force
,
greedy
,
implementation
1900
x3266
839A
Arya and Bran
implementation
900
x13949
838F
Expected Earnings
2800
x77
838E
Convex Countour
dp
2300
x322
838D
Airplane Arrangements
math
,
number theory
2700
x818
838C
Future Failure
dp
,
games
2800
x278
838B
Diverging Directions
data structures
,
dfs and similar
,
trees
2100
x700
838A
Binary Blocks
brute force
1400
x908
837G
Functions On The Segments
data structures
2500
x650
837F
Prefix Sums
binary search
,
brute force
,
combinatorics
,
math
,
matrices
2400
x741
837E
Vasya's Function
binary search
,
implementation
,
math
2100
x1510
837D
Round Subset
dp
,
math
2100
x4840
837C
Two Seals
brute force
,
implementation
1500
x3933
837B
Flag of Berland
brute force
,
implementation
1600
x3894
837A
Text Volume
implementation
800
x9248
835F
Roads in the Kingdom
dfs and similar
,
dp
,
graphs
,
trees
2500
x1000
835E
The penguin's game
binary search
,
constructive algorithms
,
interactive
2400
x1126
835D
Palindromic characteristics
brute force
,
dp
,
hashing
,
strings
1900
x3909
835C
Star sky
dp
,
implementation
1600
x7649
835B
The number on the board
greedy
1100
x10909
835A
Key races
math
800
x19948
834B
The Festive Evening
data structures
,
implementation
1100
x8524
834A
The Useless Toy
implementation
900
x8501
833E
Caramel Clouds
data structures
,
dp
,
sortings
3400
x210
833D
Red-Black Cobweb
data structures
,
divide and conquer
,
implementation
,
trees
2800
x373
833C
Ever-Hungry Krakozyabra
brute force
,
combinatorics
,
greedy
,
math
2700
x460
833B
The Bakery
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2200
x4510
833A
The Meaningless Game
math
,
number theory
1700
x6028
832E
Vasya and Shifts
matrices
2600
x279
832D
Misha, Grisha and Underground
dfs and similar
,
graphs
,
trees
1900
x3613
832C
Strange Radiation
binary search
,
implementation
,
math
2500
x427
832B
Petya and Exam
implementation
,
strings
1600
x4330
832A
Sasha and Sticks
games
,
math
800
x20380
831C
Jury Marks
brute force
,
constructive algorithms
1700
x4383
831B
Keyboard Layouts
implementation
,
strings
800
x14083
831A
Unimodal Array
implementation
1000
x10044
830E
Perpetual Motion Machine
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
,
trees
3100
x272
830D
Singer House
combinatorics
,
dp
,
graphs
,
trees
2800
x808
830C
Bamboo Partition
brute force
,
data structures
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2300
x1185
830B
Cards Sorting
data structures
,
implementation
,
sortings
1600
x2797
830A
Office Keys
binary search
,
brute force
,
dp
,
greedy
,
sortings
1800
x6597
828B
Black Square
implementation
1300
x5650
828A
Restaurant Tables
implementation
1200
x7813
827F
Dirty Arkady's Kitchen
data structures
,
dp
,
graphs
,
shortest paths
3200
x385
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