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Codeforces Round 961 (Div. 2)
02:59:17
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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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Problems
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Status
Standings
Custom test
Problems
#
Name
582D
Number of Binominal Coefficients
dp
,
math
,
number theory
3300
x614
582C
Superior Periodic Subarrays
number theory
2400
x736
582B
Once Again...
constructive algorithms
,
dp
,
matrices
1900
x3402
582A
GCD Table
constructive algorithms
,
greedy
,
number theory
1700
x7634
581F
Zublicanes and Mumocrates
dp
,
trees
,
two pointers
2400
x860
581E
Kojiro and Furrari
dp
,
greedy
2800
x190
581D
Three Logos
bitmasks
,
brute force
,
constructive algorithms
,
geometry
,
implementation
,
math
1700
x3552
581C
Developing Skills
implementation
,
math
,
sortings
1400
x7281
581B
Luxurious Houses
implementation
,
math
1100
x12975
581A
Vasya the Hipster
implementation
,
math
800
x69051
580E
Kefa and Watch
data structures
,
hashing
,
strings
2500
x1999
580D
Kefa and Dishes
bitmasks
,
dp
1800
x9404
580C
Kefa and Park
dfs and similar
,
graphs
,
trees
1500
x41307
580B
Kefa and Company
binary search
,
sortings
,
two pointers
1500
x25668
580A
Kefa and First Steps
brute force
,
dp
,
implementation
900
x86023
579B
Finding Team Member
brute force
,
implementation
,
sortings
1300
x5235
579A
Raising Bacteria
bitmasks
1000
x58616
578F
Mirror Box
matrices
,
trees
3200
x542
578E
Walking!
constructive algorithms
,
greedy
2700
x625
578D
LCS Again
dp
,
greedy
2700
x796
578C
Weakness and Poorness
ternary search
2000
x4366
578B
"Or" Game
brute force
,
greedy
1700
x5136
578A
A Problem about Polyline
geometry
,
math
1700
x4709
577B
Modulo Sum
combinatorics
,
data structures
,
dp
,
two pointers
1900
x11827
577A
Multiplication Table
implementation
,
number theory
1000
x38916
576E
Painting Edges
binary search
,
data structures
3300
x1156
576D
Flights for Regular Customers
dp
,
matrices
2700
x1332
576C
Points on Plane
constructive algorithms
,
divide and conquer
,
geometry
,
greedy
,
sortings
2100
x3275
576B
Invariance of Tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2100
x1789
576A
Vasya and Petya's Game
math
,
number theory
1500
x13575
575I
Robots protection
data structures
2800
x429
575H
Bots
combinatorics
,
dp
,
math
,
number theory
1800
x1658
575G
Run for beer
dfs and similar
,
shortest paths
2200
x868
575F
Bulbo
dp
,
greedy
2100
x990
575E
Spectator Riots
geometry
2800
x282
575D
Tablecity
constructive algorithms
,
implementation
1700
x1817
575C
Party
bitmasks
,
brute force
,
graph matchings
2700
x219
575B
Bribes
dfs and similar
,
graphs
,
trees
2200
x1051
575A
Fibonotci
data structures
,
math
,
matrices
2700
x773
574B
Bear and Three Musketeers
brute force
,
dfs and similar
,
graphs
,
hashing
1500
x7706
574A
Bear and Elections
greedy
,
implementation
1200
x9034
573E
Bear and Bowling
data structures
,
greedy
3200
x1574
573D
Bear and Cavalry
data structures
,
divide and conquer
,
dp
3000
x459
573C
Bear and Drawing
constructive algorithms
,
dfs and similar
,
trees
2300
x959
573B
Bear and Blocks
binary search
,
data structures
,
dp
,
math
1600
x5745
573A
Bear and Poker
implementation
,
math
,
number theory
1300
x16417
572B
Order Book
data structures
,
greedy
,
implementation
,
sortings
1300
x6812
572A
Arrays
sortings
900
x16418
571E
Geometric Progressions
math
3200
x253
571D
Campus
binary search
,
data structures
,
dsu
,
trees
3100
x662
571C
CNF 2
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x613
571B
Minimization
dp
,
greedy
,
sortings
2000
x2550
571A
Lengthening Sticks
combinatorics
,
implementation
,
math
2100
x2213
570E
Pig and Palindromes
combinatorics
,
dp
2300
x1839
570D
Tree Requests
binary search
,
bitmasks
,
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2200
x6868
570C
Replacement
constructive algorithms
,
data structures
,
implementation
1600
x9083
570B
Simple Game
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1300
x15974
570A
Elections
implementation
1100
x13810
569B
Inventory
greedy
,
math
1200
x7005
569A
Music
implementation
,
math
1500
x4766
568E
Longest Increasing Subsequence
data structures
,
dp
3000
x585
568D
Sign Posts
brute force
,
geometry
,
math
2800
x306
568C
New Language
2-sat
,
greedy
2600
x804
568B
Symmetric and Transitive
combinatorics
,
dp
,
math
1900
x2226
568A
Primes or Palindromes?
brute force
,
implementation
,
math
,
number theory
1600
x5025
567F
Mausoleum
dp
2400
x573
567E
President and Roads
dfs and similar
,
graphs
,
hashing
,
shortest paths
2200
x1680
567D
One-Dimensional Battle Ships
binary search
,
data structures
,
greedy
,
sortings
1700
x4717
567C
Geometric Progression
binary search
,
data structures
,
dp
1700
x9359
567B
Berland National Library
implementation
1300
x8371
567A
Lineland Mail
greedy
,
implementation
900
x31331
566G
Max and Min
geometry
2500
x334
566F
Clique in the Divisibility Graph
dp
,
math
,
number theory
1500
x3568
566E
Restoring Map
bitmasks
,
constructive algorithms
,
trees
3200
x604
566D
Restructuring Company
data structures
,
dsu
1900
x3158
566C
Logistical Questions
dfs and similar
,
divide and conquer
,
trees
3000
x710
566B
Replicating Processes
constructive algorithms
,
greedy
2600
x263
566A
Matching Names
dfs and similar
,
strings
,
trees
2300
x880
560B
Gerald is into Art
constructive algorithms
,
implementation
1200
x7870
560A
Currency System in Geraldion
implementation
,
sortings
1000
x16919
559E
Gerald and Path
dp
,
sortings
3000
x864
559D
Randomizer
combinatorics
,
geometry
,
probabilities
2800
x430
559C
Gerald and Giant Chess
combinatorics
,
dp
,
math
,
number theory
2200
x6309
559B
Equivalent Strings
divide and conquer
,
hashing
,
sortings
,
strings
1700
x10518
559A
Gerald's Hexagon
brute force
,
geometry
,
math
1600
x10346
558E
A Simple Task
data structures
,
sortings
,
strings
2300
x5815
558D
Guess Your Way Out! II
data structures
,
implementation
,
sortings
2300
x1118
558C
Amr and Chemistry
brute force
,
graphs
,
greedy
,
math
,
shortest paths
1900
x3955
558B
Amr and The Large Array
implementation
1300
x7797
558A
Lala Land and Apple Trees
brute force
,
implementation
,
sortings
1100
x10252
557E
Ann and Half-Palindrome
data structures
,
dp
,
graphs
,
string suffix structures
,
strings
,
trees
2300
x1071
557D
Vitaly and Cycle
combinatorics
,
dfs and similar
,
graphs
,
math
2000
x2152
557C
Arthur and Table
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
1900
x3956
557B
Pasha and Tea
constructive algorithms
,
implementation
,
math
,
sortings
1500
x7116
557A
Ilya and Diplomas
greedy
,
implementation
,
math
1100
x8223
556B
Case of Fake Numbers
brute force
,
implementation
1100
x7903
556A
Case of the Zeros and Ones
greedy
900
x38793
555E
Case of Computer Network
dfs and similar
,
graphs
,
trees
2800
x2298
555D
Case of a Top Secret
binary search
,
implementation
,
math
2500
x858
555C
Case of Chocolate
data structures
2200
x1951
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