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Codeforces Round 951 (Div. 2)
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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Status
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Custom test
Problems
#
Name
508C
Anya and Ghosts
constructive algorithms
,
greedy
1600
x4420
508B
Anton and currency you all know
greedy
,
math
,
strings
1300
x22163
508A
Pasha and Pixels
brute force
1100
x7797
507E
Breaking Good
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x2648
507D
The Maths Lecture
dp
,
implementation
2200
x1702
507C
Guess Your Way Out!
implementation
,
math
,
trees
1700
x4284
507B
Amr and Pins
geometry
,
math
1400
x23962
507A
Amr and Music
greedy
,
implementation
,
sortings
1000
x17367
506E
Mr. Kitayuta's Gift
combinatorics
,
dp
,
matrices
,
strings
3000
x690
506D
Mr. Kitayuta's Colorful Graph
brute force
,
dfs and similar
,
dsu
,
graphs
2400
x2035
505E
Mr. Kitayuta vs. Bamboos
binary search
,
greedy
2900
x1330
505D
Mr. Kitayuta's Technology
dfs and similar
2200
x2432
505C
Mr. Kitayuta, the Treasure Hunter
dfs and similar
,
dp
,
two pointers
1900
x6113
505B
Mr. Kitayuta's Colorful Graph
dfs and similar
,
dp
,
dsu
,
graphs
1400
x12131
505A
Mr. Kitayuta's Gift
brute force
,
implementation
,
strings
1100
x6607
504E
Misha and LCP on Tree
binary search
,
dfs and similar
,
hashing
,
string suffix structures
,
trees
3000
x876
504D
Misha and XOR
bitmasks
2700
x299
501E
Misha and Palindrome Degree
binary search
,
combinatorics
,
implementation
2500
x720
501D
Misha and Permutations Summation
data structures
2000
x2356
501C
Misha and Forest
constructive algorithms
,
data structures
,
greedy
,
sortings
,
trees
1500
x5520
501B
Misha and Changing Handles
data structures
,
dsu
,
strings
1100
x15683
501A
Contest
implementation
900
x22079
500G
New Year Running
number theory
,
trees
3200
x157
500F
New Year Shopping
divide and conquer
,
dp
2700
x700
500E
New Year Domino
data structures
,
dp
,
dsu
2300
x1400
500D
New Year Santa Network
combinatorics
,
dfs and similar
,
graphs
,
trees
1900
x3072
500C
New Year Book Reading
constructive algorithms
,
greedy
,
implementation
,
math
1600
x5753
500B
New Year Permutation
dfs and similar
,
dsu
,
graphs
,
greedy
,
math
,
sortings
1600
x8732
500A
New Year Transportation
dfs and similar
,
graphs
,
implementation
1000
x50657
499B
Lecture
implementation
,
strings
1000
x37735
499A
Watching a movie
greedy
,
implementation
1000
x13745
498E
Stairs and Lines
dp
,
matrices
2700
x451
498D
Traffic Jams in the Land
data structures
,
dp
,
number theory
2400
x1066
498C
Array and Operations
flows
,
graph matchings
,
number theory
2100
x3321
498B
Name That Tune
dp
,
probabilities
,
two pointers
2400
x1150
498A
Crazy Town
geometry
1700
x6350
497E
Subsequences Return
dp
,
matrices
2900
x282
497D
Gears
brute force
,
geometry
,
math
2900
x226
496E
Distributing Parts
greedy
,
sortings
2100
x1634
496D
Tennis Game
binary search
1900
x2983
496C
Removing Columns
brute force
,
constructive algorithms
,
implementation
1500
x7617
496B
Secret Combination
brute force
,
constructive algorithms
,
implementation
1500
x5817
496A
Minimum Difficulty
brute force
,
implementation
,
math
900
x16155
495B
Modular Equations
math
,
number theory
1600
x6572
495A
Digital Counter
implementation
1100
x8322
494E
Sharti
data structures
,
games
3200
x309
494D
Birthday
data structures
,
dfs and similar
,
dp
,
trees
2700
x516
494C
Helping People
dp
,
probabilities
2600
x835
494B
Obsessive String
dp
,
strings
2000
x2611
494A
Treasure
greedy
1500
x6135
493E
Vasya and Polynomial
math
2800
x479
493D
Vasya and Chess
constructive algorithms
,
games
,
math
1700
x9540
493C
Vasya and Basketball
binary search
,
brute force
,
data structures
,
implementation
,
sortings
,
two pointers
1600
x6693
493B
Vasya and Wrestling
implementation
1400
x13043
493A
Vasya and Football
implementation
1300
x6032
492E
Vanya and Field
math
2000
x1592
492D
Vanya and Computer Game
binary search
,
implementation
,
math
,
sortings
1800
x3123
492C
Vanya and Exams
greedy
,
sortings
1400
x13741
492B
Vanya and Lanterns
binary search
,
implementation
,
math
,
sortings
1200
x71861
492A
Vanya and Cubes
implementation
800
x47292
491C
Deciphering
flows
,
graph matchings
2300
x403
491B
New York Hotel
greedy
,
math
2100
x538
491A
Up the hill
constructive algorithms
,
implementation
1000
x2829
490F
Treeland Tour
data structures
,
dfs and similar
,
dp
,
trees
2200
x1566
490E
Restoring Increasing Sequence
binary search
,
brute force
,
greedy
,
implementation
2000
x1560
490D
Chocolate
brute force
,
dfs and similar
,
math
,
meet-in-the-middle
,
number theory
1900
x2072
490C
Hacking Cypher
brute force
,
math
,
number theory
,
strings
1700
x8929
490B
Queue
dsu
,
implementation
1500
x5908
490A
Team Olympiad
greedy
,
implementation
,
sortings
800
x56086
489F
Special Matrices
combinatorics
,
dp
2100
x1600
489E
Hiking
binary search
,
dp
2300
x1000
489D
Unbearable Controversy of Being
brute force
,
combinatorics
,
dfs and similar
,
graphs
1700
x6556
489C
Given Length and Sum of Digits...
dp
,
greedy
,
implementation
1400
x44789
489B
BerSU Ball
dfs and similar
,
dp
,
graph matchings
,
greedy
,
sortings
,
two pointers
1200
x46913
489A
SwapSort
greedy
,
implementation
,
sortings
1200
x9856
488B
Candy Boxes
brute force
,
constructive algorithms
,
math
1900
x2091
488A
Giga Tower
brute force
1100
x14079
487E
Tourists
data structures
,
dfs and similar
,
graphs
,
trees
3200
x2155
487D
Conveyor Belts
data structures
2700
x840
487C
Prefix Product Sequence
constructive algorithms
,
math
,
number theory
2300
x2523
487B
Strip
binary search
,
data structures
,
dp
,
two pointers
2000
x3372
487A
Fight the Monster
binary search
,
brute force
,
implementation
1800
x3679
486E
LIS of Sequence
data structures
,
dp
,
greedy
,
hashing
,
math
2200
x2136
486D
Valid Sets
dfs and similar
,
dp
,
math
,
trees
2100
x3863
486C
Palindrome Transformation
brute force
,
greedy
,
implementation
1700
x11535
486B
OR in Matrix
greedy
,
hashing
,
implementation
1300
x17029
486A
Calculating Function
implementation
,
math
800
x110610
485B
Valuable Resources
brute force
,
greedy
1300
x6461
485A
Factory
implementation
,
math
,
matrices
1400
x8110
484E
Sign on Fence
binary search
,
constructive algorithms
,
data structures
2500
x2176
484D
Kindergarten
data structures
,
dp
,
greedy
2400
x2431
484C
Strange Sorting
implementation
,
math
2600
x582
484B
Maximum Value
binary search
,
math
,
sortings
,
two pointers
2100
x6807
484A
Bits
bitmasks
,
constructive algorithms
1700
x10793
483B
Friends and Presents
binary search
,
math
1800
x4002
483A
Counterexample
brute force
,
implementation
,
math
,
number theory
1100
x22343
482E
ELCA
data structures
,
trees
3200
x176
482D
Random Function and Tree
combinatorics
,
dp
,
trees
2700
x521
482C
Game with Strings
bitmasks
,
dp
,
probabilities
2600
x877
482B
Interesting Array
constructive algorithms
,
data structures
,
trees
1800
x6194
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