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Codeforces Round 974 (Div. 3)
02:59:03
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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
766E
Mahmoud and a xor trip
bitmasks
,
constructive algorithms
,
data structures
,
dfs and similar
,
dp
,
math
,
trees
2100
x2984
766D
Mahmoud and a Dictionary
data structures
,
dfs and similar
,
dp
,
dsu
,
graphs
2000
x3376
766C
Mahmoud and a Message
brute force
,
dp
,
greedy
,
strings
1700
x4379
765G
Math, math everywhere
brute force
,
dp
,
math
,
meet-in-the-middle
,
number theory
3200
x85
765F
Souvenirs
data structures
3100
x2017
765E
Tree Folding
dfs and similar
,
dp
,
greedy
,
implementation
,
trees
2200
x1276
765D
Artsem and Saunders
constructive algorithms
,
dsu
,
math
1700
x2468
763E
Timofey and our friends animals
data structures
,
divide and conquer
,
dsu
2900
x502
763D
Timofey and a flat tree
data structures
,
graphs
,
hashing
,
shortest paths
,
trees
2900
x551
763C
Timofey and remoduling
brute force
,
implementation
,
math
,
number theory
2600
x708
763B
Timofey and rectangles
constructive algorithms
,
geometry
2100
x2805
763A
Timofey and a tree
dfs and similar
,
dp
,
dsu
,
graphs
,
implementation
,
trees
1600
x10513
762F
Tree nesting
combinatorics
,
graphs
,
trees
2800
x375
762E
Radio stations
binary search
,
data structures
2200
x1363
762D
Maximum path
dp
,
greedy
,
implementation
2300
x1550
762C
Two strings
binary search
,
hashing
,
strings
,
two pointers
2100
x2478
761F
Dasha and Photos
brute force
,
data structures
,
dp
,
implementation
2600
x411
761E
Dasha and Puzzle
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
trees
2000
x2100
761D
Dasha and Very Difficult Problem
binary search
,
brute force
,
constructive algorithms
,
greedy
,
sortings
1700
x3965
758F
Geometrical Progression
brute force
,
math
,
number theory
2400
x628
758E
Broken Tree
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2600
x478
758D
Ability To Convert
constructive algorithms
,
dp
,
greedy
,
math
,
strings
2000
x2708
758C
Unfair Poll
binary search
,
constructive algorithms
,
implementation
,
math
1700
x3866
757G
Can Bash Save the Day?
data structures
,
divide and conquer
,
graphs
,
trees
3400
x500
757F
Team Rocket Rises Again
data structures
,
graphs
,
shortest paths
2800
x1153
757E
Bash Plays with Functions
brute force
,
combinatorics
,
dp
,
number theory
2500
x1317
757D
Felicity's Big Secret Revealed
bitmasks
,
dp
2200
x1398
757C
Felicity is Coming!
data structures
,
hashing
,
sortings
,
strings
1900
x2333
756F
Long number
expression parsing
,
math
,
number theory
3400
x92
756E
Byteland coins
combinatorics
,
dp
,
math
3200
x163
756D
Bacterial Melee
brute force
,
combinatorics
,
dp
,
string suffix structures
2400
x1001
756C
Nikita and stack
data structures
2200
x1343
756B
Travel Card
binary search
,
dp
1600
x3460
756A
Pavel and barbecue
constructive algorithms
,
dfs and similar
1700
x3025
755G
PolandBall and Many Other Balls
combinatorics
,
divide and conquer
,
dp
,
fft
,
math
,
number theory
3200
x908
755F
PolandBall and Gifts
bitmasks
,
dp
,
greedy
2600
x1343
755E
PolandBall and White-Red graph
constructive algorithms
,
graphs
,
shortest paths
2400
x842
755D
PolandBall and Polygon
data structures
2000
x2489
754E
Dasha and cyclic table
bitmasks
,
brute force
,
fft
,
strings
,
trees
2600
x496
754D
Fedor and coupons
binary search
,
data structures
,
greedy
,
sortings
2100
x2457
754C
Vladik and chat
brute force
,
constructive algorithms
,
dp
,
implementation
,
strings
2200
x928
753C
Interactive Bulls and Cows (Hard)
brute force
,
constructive algorithms
,
interactive
2500
x291
753B
Interactive Bulls and Cows (Easy)
brute force
,
constructive algorithms
,
implementation
1600
x1190
750H
New Year and Snowy Grid
dfs and similar
,
dsu
,
graphs
,
interactive
3500
x192
750G
New Year and Binary Tree Paths
bitmasks
,
brute force
,
combinatorics
,
dp
3200
x447
750F
New Year and Finding Roots
constructive algorithms
,
implementation
,
interactive
,
trees
2800
x482
750E
New Year and Old Subsequence
data structures
,
divide and conquer
,
dp
,
matrices
2600
x1561
750D
New Year and Fireworks
brute force
,
data structures
,
dfs and similar
,
dp
,
implementation
1900
x3077
750C
New Year and Rating
binary search
,
greedy
,
math
1600
x6547
749E
Inversions After Shuffle
data structures
,
probabilities
2400
x1051
749D
Leaving Auction
binary search
,
data structures
2000
x2556
748F
Santa Clauses and a Soccer Championship
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2300
x646
748E
Santa Claus and Tangerines
binary search
,
data structures
,
greedy
,
two pointers
2100
x1465
748D
Santa Claus and a Palindrome
constructive algorithms
,
data structures
,
greedy
2100
x1857
747F
Igor and Interesting Numbers
brute force
,
combinatorics
,
dp
,
math
2500
x418
747E
Comments
dfs and similar
,
expression parsing
,
implementation
,
strings
1700
x1959
747D
Winter Is Coming
dp
,
greedy
,
sortings
1800
x3242
746G
New Roads
constructive algorithms
,
graphs
,
trees
2100
x1509
746F
Music in Car
data structures
,
greedy
,
two pointers
2200
x742
746E
Numbers Exchange
greedy
,
implementation
,
math
1900
x1734
746C
Tram
constructive algorithms
,
implementation
,
math
1600
x3708
744E
Hongcow Masters the Cyclic Shift
strings
,
two pointers
3200
x135
744D
Hongcow Draws a Circle
geometry
3200
x119
744C
Hongcow Buys a Deck of Cards
bitmasks
,
brute force
,
dp
2400
x1086
744B
Hongcow's Game
bitmasks
,
divide and conquer
,
interactive
1900
x1750
743E
Vladik and cards
binary search
,
bitmasks
,
brute force
,
dp
2200
x1498
743D
Chloe and pleasant prizes
dfs and similar
,
dp
,
graphs
,
trees
1800
x4302
741E
Arpa’s abnormal DNA and Mehrdad’s deep interest
data structures
,
string suffix structures
3400
x177
741D
Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths
data structures
,
dfs and similar
,
trees
2900
x2708
741C
Arpa’s overnight party and Mehrdad’s silent entering
constructive algorithms
,
dfs and similar
,
graphs
2600
x2570
741B
Arpa's weak amphitheater and Mehrdad's valuable Hoses
dfs and similar
,
dp
,
dsu
1600
x5217
741A
Arpa's loud Owf and Mehrdad's evil plan
dfs and similar
,
math
1600
x5423
739E
Gosha is hunting
brute force
,
data structures
,
dp
,
flows
,
math
,
probabilities
,
sortings
3000
x2157
739D
Recover a functional graph
graph matchings
3400
x186
739C
Alyona and towers
data structures
2500
x1506
739B
Alyona and a tree
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
1900
x4578
739A
Alyona and mex
constructive algorithms
,
greedy
1700
x7824
737F
Dirty plates
constructive algorithms
,
math
3300
x70
737E
Tanya is 5!
graph matchings
,
graphs
,
greedy
,
schedules
3300
x121
736E
Chess Championship
constructive algorithms
,
flows
,
greedy
,
math
2900
x187
736D
Permutations
math
,
matrices
2800
x459
735E
Ostap and Tree
dp
,
trees
2500
x864
735D
Taxes
math
,
number theory
1600
x13366
735C
Tennis Championship
combinatorics
,
constructive algorithms
,
greedy
,
math
1600
x7497
734F
Anton and School
bitmasks
,
constructive algorithms
,
implementation
,
math
2500
x1292
734E
Anton and Tree
dfs and similar
,
dp
,
trees
2100
x4147
734D
Anton and Chess
implementation
1700
x3722
734C
Anton and Making Potions
binary search
,
dp
,
greedy
,
two pointers
1600
x5322
733F
Drivers Dissatisfaction
data structures
,
dsu
,
graphs
,
trees
2200
x1110
733E
Sleep in Class
constructive algorithms
,
data structures
,
math
,
two pointers
2400
x893
733D
Kostya the Sculptor
data structures
,
hashing
1600
x4166
733C
Epidemic in Monstropolis
constructive algorithms
,
dp
,
greedy
,
two pointers
1800
x3339
732F
Tourist Reform
dfs and similar
,
graphs
2300
x2514
732E
Sockets
greedy
,
sortings
2100
x1604
732D
Exams
binary search
,
greedy
,
sortings
1700
x5495
731F
Video Cards
brute force
,
data structures
,
implementation
,
math
,
number theory
1900
x2823
731E
Funny Game
dp
,
games
2200
x1656
731D
80-th Level Archeology
brute force
,
data structures
,
greedy
,
sortings
2200
x1167
731C
Socks
dfs and similar
,
dsu
,
graphs
,
greedy
1600
x6911
730L
Expression Queries
data structures
3200
x86
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