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Codeforces Round 974 (Div. 3)
08:02:58
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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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Custom test
Problems
#
Name
845D
Driving Test
data structures
,
dp
,
greedy
1800
x2368
845C
Two TVs
data structures
,
greedy
,
sortings
1500
x8522
845B
Luba And The Ticket
brute force
,
greedy
,
implementation
1600
x5020
845A
Chess Tourney
implementation
,
sortings
1100
x7748
844B
Rectangles
combinatorics
,
math
1300
x7332
844A
Diversity
greedy
,
implementation
,
strings
1000
x10909
843E
Maximum Flow
flows
,
graphs
3000
x318
843D
Dynamic Shortest Path
graphs
,
shortest paths
3400
x834
843C
Upgrading Tree
constructive algorithms
,
dfs and similar
,
graphs
,
math
,
trees
2600
x360
843B
Interactive LowerBound
brute force
,
interactive
,
probabilities
2000
x2240
843A
Sorting by Subsequences
dfs and similar
,
dsu
,
implementation
,
math
,
sortings
1400
x5619
842E
Nikita and game
binary search
,
dfs and similar
,
divide and conquer
,
graphs
,
trees
2800
x417
842D
Vitya and Strange Lesson
binary search
,
data structures
2000
x3631
842C
Ilya And The Tree
dfs and similar
,
graphs
,
math
,
number theory
,
trees
2000
x3475
842B
Gleb And Pizza
geometry
1100
x10315
842A
Kirill And The Game
brute force
,
two pointers
1200
x10167
841B
Godsend
games
,
math
1100
x12229
841A
Generous Kefa
brute force
,
implementation
900
x13119
840E
In a Trap
trees
3200
x468
840D
Destiny
data structures
,
probabilities
2500
x2973
840C
On the Bench
combinatorics
,
dp
2500
x1722
840B
Leha and another game about graph
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
graphs
2100
x2465
840A
Leha and Function
combinatorics
,
greedy
,
math
,
number theory
,
sortings
1300
x6992
839E
Mother of Dragons
brute force
,
graphs
,
math
,
meet-in-the-middle
2700
x906
839D
Winter is here
combinatorics
,
dp
,
math
,
number theory
2200
x2892
839C
Journey
dfs and similar
,
dp
,
graphs
,
probabilities
,
trees
1500
x16696
839B
Game of the Rows
brute force
,
greedy
,
implementation
1900
x3321
839A
Arya and Bran
implementation
900
x14125
838F
Expected Earnings
2800
x97
838E
Convex Countour
dp
2300
x354
838D
Airplane Arrangements
math
,
number theory
2700
x890
838C
Future Failure
dp
,
games
2800
x293
838B
Diverging Directions
data structures
,
dfs and similar
,
trees
2100
x782
838A
Binary Blocks
brute force
1400
x920
837G
Functions On The Segments
data structures
2500
x674
837F
Prefix Sums
binary search
,
brute force
,
combinatorics
,
math
,
matrices
2400
x956
837E
Vasya's Function
binary search
,
implementation
,
math
2100
x1764
837D
Round Subset
dp
,
math
2100
x5442
837C
Two Seals
brute force
,
implementation
1500
x3991
837B
Flag of Berland
brute force
,
implementation
1600
x3927
837A
Text Volume
implementation
800
x9375
835F
Roads in the Kingdom
dfs and similar
,
dp
,
graphs
,
trees
2500
x1061
835E
The penguin's game
binary search
,
constructive algorithms
,
interactive
2400
x1148
835D
Palindromic characteristics
brute force
,
dp
,
hashing
,
strings
1900
x4104
835C
Star sky
dp
,
implementation
1600
x7864
835B
The number on the board
greedy
1100
x11029
835A
Key races
math
800
x20129
834B
The Festive Evening
data structures
,
implementation
1100
x8763
834A
The Useless Toy
implementation
900
x8625
833E
Caramel Clouds
data structures
,
dp
,
sortings
3400
x223
833D
Red-Black Cobweb
data structures
,
divide and conquer
,
implementation
,
trees
2800
x392
833C
Ever-Hungry Krakozyabra
brute force
,
combinatorics
,
greedy
,
math
2700
x471
833B
The Bakery
binary search
,
data structures
,
divide and conquer
,
dp
,
two pointers
2200
x4902
833A
The Meaningless Game
math
,
number theory
1700
x6166
832E
Vasya and Shifts
matrices
2600
x324
832D
Misha, Grisha and Underground
dfs and similar
,
graphs
,
trees
1900
x3757
832C
Strange Radiation
binary search
,
implementation
,
math
2500
x447
832B
Petya and Exam
implementation
,
strings
1600
x4372
832A
Sasha and Sticks
games
,
math
800
x20665
831C
Jury Marks
brute force
,
constructive algorithms
1700
x4523
831B
Keyboard Layouts
implementation
,
strings
800
x14372
831A
Unimodal Array
implementation
1000
x10247
830E
Perpetual Motion Machine
constructive algorithms
,
dp
,
graphs
,
implementation
,
math
,
trees
3100
x277
830D
Singer House
combinatorics
,
dp
,
graphs
,
trees
2800
x827
830C
Bamboo Partition
brute force
,
data structures
,
implementation
,
math
,
number theory
,
sortings
,
two pointers
2300
x1196
830B
Cards Sorting
data structures
,
implementation
,
sortings
1600
x2833
830A
Office Keys
binary search
,
brute force
,
dp
,
greedy
,
sortings
1800
x6969
828B
Black Square
implementation
1300
x5684
828A
Restaurant Tables
implementation
1200
x7909
827F
Dirty Arkady's Kitchen
data structures
,
dp
,
graphs
,
shortest paths
3200
x400
827E
Rusty String
fft
,
math
,
strings
2700
x960
827D
Best Edge Weight
data structures
,
dfs and similar
,
graphs
,
trees
2700
x1157
827C
DNA Evolution
data structures
,
strings
2100
x1637
827B
High Load
constructive algorithms
,
greedy
,
implementation
,
trees
1800
x3504
827A
String Reconstruction
data structures
,
greedy
,
sortings
,
strings
1700
x4036
825G
Tree Queries
dfs and similar
,
graphs
,
trees
2500
x1200
825F
String Compression
dp
,
hashing
,
string suffix structures
,
strings
2400
x1492
825E
Minimal Labels
data structures
,
dfs and similar
,
graphs
,
greedy
2300
x3381
825D
Suitable Replacement
binary search
,
greedy
,
implementation
1500
x3260
825C
Multi-judge Solving
greedy
,
implementation
1600
x4530
825B
Five-In-a-Row
brute force
,
implementation
1600
x4245
825A
Binary Protocol
implementation
1100
x7675
822F
Madness
constructive algorithms
,
dfs and similar
,
trees
2500
x345
822E
Liar
binary search
,
dp
,
hashing
,
string suffix structures
2400
x837
822D
My pretty girl Noora
brute force
,
dp
,
greedy
,
math
,
number theory
1800
x3084
822C
Hacker, pack your bags!
binary search
,
greedy
,
implementation
,
sortings
1600
x4576
822B
Crossword solving
brute force
,
implementation
,
strings
1000
x9507
822A
I'm bored with life
implementation
,
math
,
number theory
800
x32886
821E
Okabe and El Psy Kongroo
dp
,
matrices
2100
x1459
821D
Okabe and City
dfs and similar
,
graphs
,
shortest paths
2200
x1395
821C
Okabe and Boxes
data structures
,
greedy
,
trees
1500
x6790
821B
Okabe and Banana Trees
brute force
,
math
1300
x5750
821A
Okabe and Future Gadget Laboratory
implementation
800
x8229
820B
Mister B and Angle in Polygon
constructive algorithms
,
geometry
,
math
1300
x5199
820A
Mister B and Book Reading
implementation
900
x8118
819E
Mister B and Flight to the Moon
constructive algorithms
,
graphs
2800
x510
819D
Mister B and Astronomers
number theory
2900
x262
819C
Mister B and Beacons on Field
number theory
2900
x210
819B
Mister B and PR Shifts
data structures
,
implementation
,
math
1900
x1696
819A
Mister B and Boring Game
games
,
greedy
2200
x490
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