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Codeforces Round 974 (Div. 3)
00:36:18
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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
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Custom test
Problems
#
Name
710B
Optimal Point on a Line
brute force
,
sortings
1400
x8735
710A
King Moves
implementation
800
x13766
709B
Checkpoints
greedy
,
implementation
,
sortings
1500
x4726
709A
Juicer
implementation
900
x31855
708E
Student's Camp
dp
,
math
3100
x973
708D
Incorrect Flow
flows
2900
x758
708C
Centroids
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
trees
2300
x3260
708B
Recover the String
constructive algorithms
,
greedy
,
implementation
,
math
1900
x3237
708A
Letters Cyclic Shift
constructive algorithms
,
greedy
,
implementation
,
strings
1200
x8982
707E
Garlands
data structures
2400
x1215
707D
Persistent Bookcase
bitmasks
,
data structures
,
dfs and similar
,
implementation
2200
x2654
707C
Pythagorean Triples
math
,
number theory
1500
x12595
707B
Bakery
graphs
1300
x12902
707A
Brain's Photos
implementation
800
x48800
706E
Working routine
data structures
,
implementation
2500
x1180
706D
Vasiliy's Multiset
binary search
,
bitmasks
,
data structures
,
trees
1800
x9979
706C
Hard problem
dp
,
strings
1600
x16101
706B
Interesting drink
binary search
,
dp
,
implementation
1100
x62378
706A
Beru-taxi
brute force
,
geometry
,
implementation
900
x14451
705B
Spider Man
games
,
math
1100
x9112
705A
Hulk
implementation
800
x105340
704E
Iron Man
data structures
,
geometry
,
trees
3300
x282
704D
Captain America
flows
,
greedy
3100
x791
704C
Black Widow
dp
,
graphs
,
implementation
,
math
2900
x460
704B
Ant Man
dp
,
graphs
,
greedy
2500
x1834
704A
Thor
brute force
,
data structures
,
implementation
1600
x9200
703E
Mishka and Divisors
dp
,
number theory
2600
x594
703D
Mishka and Interesting sum
data structures
2100
x3578
703C
Chris and Road
geometry
,
implementation
2100
x1845
703B
Mishka and trip
implementation
,
math
1400
x5669
703A
Mishka and Game
implementation
800
x56012
702F
T-Shirts
data structures
2800
x1393
702E
Analysis of Pathes in Functional Graph
data structures
,
graphs
2100
x2590
702D
Road to Post Office
math
1900
x3352
702C
Cellular Network
binary search
,
implementation
,
two pointers
1500
x14691
702B
Powers of Two
brute force
,
data structures
,
implementation
,
math
1500
x11746
702A
Maximum Increase
dp
,
greedy
,
implementation
800
x44540
701C
They Are Everywhere
binary search
,
strings
,
two pointers
1500
x14892
701B
Cells Not Under Attack
data structures
,
math
1200
x11712
701A
Cards
greedy
,
implementation
800
x19469
700E
Cool Slogans
string suffix structures
,
strings
3300
x1177
700D
Huffman Coding on Segment
data structures
,
greedy
3100
x461
700C
Break Up
dfs and similar
,
graphs
2600
x1279
700B
Connecting Universities
dfs and similar
,
dp
,
graphs
,
trees
1800
x3942
700A
As Fast As Possible
binary search
,
math
1900
x3180
699B
One Bomb
implementation
1400
x7579
699A
Launch of Collider
implementation
1000
x15811
698F
Coprime Permutation
combinatorics
,
number theory
3000
x436
698E
Cron
2800
x117
698D
Limak and Shooting Points
brute force
,
geometry
,
math
2600
x538
698C
LRU
bitmasks
,
dp
,
math
,
probabilities
2400
x1308
698B
Fix a Tree
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
trees
1700
x5705
698A
Vacations
dp
1400
x29994
697B
Barnicle
brute force
,
implementation
,
math
,
strings
1400
x5699
697A
Pineapple Incident
implementation
,
math
900
x12735
696F
...Dary!
binary search
,
geometry
,
two pointers
3300
x122
696E
...Wait for it...
data structures
,
dsu
,
trees
3000
x542
696D
Legen...
data structures
,
dp
,
matrices
,
strings
2500
x1295
696C
PLEASE
combinatorics
,
dp
,
implementation
,
math
,
matrices
2000
x2080
696B
Puzzles
dfs and similar
,
math
,
probabilities
,
trees
1700
x3473
696A
Lorenzo Von Matterhorn
brute force
,
data structures
,
implementation
,
trees
1500
x6050
691F
Couple Cover
brute force
,
dp
,
number theory
2200
x1298
691E
Xor-sequences
matrices
1900
x2509
691D
Swaps in Permutation
dfs and similar
,
dsu
,
math
1700
x5498
691C
Exponential notation
implementation
,
strings
1800
x2599
691B
s-palindrome
implementation
,
strings
1600
x4801
691A
Fashion in Berland
implementation
1000
x10126
690F3
Tree of Life (hard)
trees
3200
x47
690F2
Tree of Life (medium)
constructive algorithms
,
hashing
,
trees
2700
x81
690F1
Tree of Life (easy)
1300
x2151
690E2
Photographs (II)
2600
x142
690E1
Photographs (I)
1800
x674
690D3
The Wall (hard)
dp
2100
x501
690D2
The Wall (medium)
combinatorics
1800
x1240
690D1
The Wall (easy)
1200
x2609
690C3
Brain Network (hard)
trees
2200
x902
690C2
Brain Network (medium)
dfs and similar
,
graphs
,
trees
1500
x3708
690C1
Brain Network (easy)
1300
x2749
690B3
Recover Polygon (hard)
data structures
2600
x92
690B2
Recover Polygon (medium)
geometry
2600
x200
690B1
Recover Polygon (easy)
1700
x937
690A3
Collective Mindsets (hard)
2400
x541
690A2
Collective Mindsets (medium)
2300
x702
690A1
Collective Mindsets (easy)
1100
x2812
689E
Mike and Geometry Problem
combinatorics
,
data structures
,
dp
,
geometry
,
implementation
2000
x1922
689D
Friends and Subsequences
binary search
,
data structures
2100
x3408
689C
Mike and Chocolate Thieves
binary search
,
combinatorics
,
math
1700
x5284
689B
Mike and Shortcuts
dfs and similar
,
graphs
,
greedy
,
shortest paths
1600
x5687
689A
Mike and Cellphone
brute force
,
constructive algorithms
,
implementation
1400
x5249
688B
Lovely Palindromes
constructive algorithms
,
math
1000
x31859
688A
Opponents
implementation
800
x13922
687E
TOF
dfs and similar
,
graphs
2900
x318
687D
Dividing Kingdom II
brute force
,
data structures
,
dsu
,
graphs
,
sortings
2500
x867
687C
The Values You Can Make
dp
1900
x5408
687B
Remainders Game
chinese remainder theorem
,
math
,
number theory
1800
x5823
687A
NP-Hard Problem
dfs and similar
,
graphs
1500
x14276
686B
Little Robber Girl's Zoo
constructive algorithms
,
implementation
,
sortings
1100
x7776
686A
Free Ice Cream
constructive algorithms
,
implementation
800
x37322
685E
Travelling Through the Snow Queen's Kingdom
bitmasks
,
brute force
,
divide and conquer
,
graphs
2800
x550
685D
Kay and Eternity
brute force
,
implementation
,
sortings
2600
x480
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