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Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)
06:16:03
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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
#
Name
749E
Inversions After Shuffle
data structures
,
probabilities
2400
x1037
749D
Leaving Auction
binary search
,
data structures
2000
x2534
748F
Santa Clauses and a Soccer Championship
constructive algorithms
,
dfs and similar
,
graphs
,
trees
2300
x642
748E
Santa Claus and Tangerines
binary search
,
data structures
,
greedy
,
two pointers
2100
x1455
748D
Santa Claus and a Palindrome
constructive algorithms
,
data structures
,
greedy
2100
x1829
747F
Igor and Interesting Numbers
brute force
,
combinatorics
,
dp
,
math
2500
x416
747E
Comments
dfs and similar
,
expression parsing
,
implementation
,
strings
1700
x1948
747D
Winter Is Coming
dp
,
greedy
,
sortings
1800
x3091
746G
New Roads
constructive algorithms
,
graphs
,
trees
2100
x1496
746F
Music in Car
data structures
,
greedy
,
two pointers
2200
x731
746E
Numbers Exchange
greedy
,
implementation
,
math
1900
x1719
744E
Hongcow Masters the Cyclic Shift
strings
,
two pointers
3200
x134
744D
Hongcow Draws a Circle
geometry
3200
x119
744C
Hongcow Buys a Deck of Cards
bitmasks
,
brute force
,
dp
2400
x1042
744B
Hongcow's Game
bitmasks
,
divide and conquer
,
interactive
1900
x1712
743E
Vladik and cards
binary search
,
bitmasks
,
brute force
,
dp
2200
x1485
743D
Chloe and pleasant prizes
dfs and similar
,
dp
,
graphs
,
trees
1800
x4277
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
x2514
741C
Arpa’s overnight party and Mehrdad’s silent entering
constructive algorithms
,
dfs and similar
,
graphs
2600
x2511
739E
Gosha is hunting
brute force
,
data structures
,
dp
,
flows
,
math
,
probabilities
,
sortings
3000
x2104
739D
Recover a functional graph
graph matchings
3400
x185
739C
Alyona and towers
data structures
2500
x1461
739B
Alyona and a tree
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
1900
x4477
739A
Alyona and mex
constructive algorithms
,
greedy
1700
x7739
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
x185
736D
Permutations
math
,
matrices
2800
x455
735E
Ostap and Tree
dp
,
trees
2500
x853
734F
Anton and School
bitmasks
,
constructive algorithms
,
implementation
,
math
2500
x1286
734E
Anton and Tree
dfs and similar
,
dp
,
trees
2100
x4043
734D
Anton and Chess
implementation
1700
x3707
733F
Drivers Dissatisfaction
data structures
,
dsu
,
graphs
,
trees
2200
x1096
733E
Sleep in Class
constructive algorithms
,
data structures
,
math
,
two pointers
2400
x882
733C
Epidemic in Monstropolis
constructive algorithms
,
dp
,
greedy
,
two pointers
1800
x3317
732F
Tourist Reform
dfs and similar
,
graphs
2300
x2438
732E
Sockets
greedy
,
sortings
2100
x1598
732D
Exams
binary search
,
greedy
,
sortings
1700
x5444
731F
Video Cards
brute force
,
data structures
,
implementation
,
math
,
number theory
1900
x2785
731E
Funny Game
dp
,
games
2200
x1598
731D
80-th Level Archeology
brute force
,
data structures
,
greedy
,
sortings
2200
x1160
730L
Expression Queries
data structures
3200
x86
730K
Roads Orientation Problem
graphs
3200
x98
730J
Bottles
dp
1900
x3224
730I
Olympiad in Programming and Sports
dp
,
flows
,
graphs
,
greedy
2000
x1983
730F
Ber Patio
3100
x90
730E
Award Ceremony
greedy
,
implementation
2200
x716
730D
Running Over The Bridges
greedy
,
implementation
,
math
2200
x867
730C
Bulmart
binary search
,
dfs and similar
2100
x1205
730B
Minimum and Maximum
constructive algorithms
,
interactive
1800
x2402
730A
Toda 2
greedy
,
implementation
1800
x1559
729F
Financiers Game
dp
2500
x939
729E
Subordinates
constructive algorithms
,
data structures
,
graphs
,
greedy
,
sortings
1900
x2160
729D
Sea Battle
constructive algorithms
,
greedy
,
math
1700
x3643
729C
Road to Cinema
binary search
,
greedy
,
sortings
1700
x3884
727F
Polycarp's problems
binary search
,
dp
,
greedy
2300
x775
727E
Games on a CD
data structures
,
hashing
,
string suffix structures
,
strings
2300
x1160
727D
T-shirts Distribution
constructive algorithms
,
flows
,
greedy
1800
x1811
725G
Messages on a Tree
3300
x163
725F
Family Photos
games
,
greedy
2900
x488
725E
Too Much Money
brute force
,
greedy
2600
x647
725D
Contest Balloons
data structures
,
greedy
1800
x2769
724G
Xor-matic Number of the Graph
bitmasks
,
graphs
,
math
,
number theory
,
trees
2600
x1015
724F
Uniformly Branched Trees
combinatorics
,
dp
,
trees
2700
x395
724E
Goods transportation
dp
,
flows
,
greedy
2900
x1272
724D
Dense Subsequence
data structures
,
greedy
,
strings
1900
x2276
724C
Ray Tracing
greedy
,
hashing
,
implementation
,
math
,
number theory
,
sortings
1800
x2126
723F
st-Spanning Tree
dsu
,
graphs
,
greedy
,
implementation
2300
x1456
723E
One-Way Reform
constructive algorithms
,
dfs and similar
,
flows
,
graphs
,
greedy
2200
x1911
722F
Cyclic Cipher
chinese remainder theorem
,
data structures
,
implementation
,
number theory
,
two pointers
2800
x487
722E
Research Rover
combinatorics
,
dp
2900
x808
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3110
721E
Road to Home
binary search
,
dp
2700
x303
721D
Maxim and Array
constructive algorithms
,
data structures
,
greedy
,
math
2000
x2330
721C
Journey
dp
,
graphs
1800
x5776
720F
Array Covering
data structures
3100
x146
720E
Cipher
implementation
3100
x63
720D
Slalom
data structures
,
dp
,
sortings
3100
x227
720C
Homework
constructive algorithms
3100
x99
720B
Cactusophobia
dfs and similar
,
flows
2400
x398
720A
Closing ceremony
greedy
2000
x847
718E
Matvey's Birthday
bitmasks
,
graphs
3300
x351
718D
Andrew and Chemistry
dp
,
hashing
,
trees
2900
x392
718C
Sasha and Array
data structures
,
math
,
matrices
2300
x3511
718A
Efim and Strange Grade
dp
,
implementation
,
math
1700
x4380
717I
Cowboy Beblop at his computer
geometry
2800
x203
717H
Pokermon League challenge
math
,
probabilities
2400
x420
717G
Underfail
flows
2400
x632
717F
Heroes of Making Magic III
data structures
2600
x290
717E
Paint it really, really dark gray
dfs and similar
1900
x1432
717D
Dexterina’s Lab
games
,
matrices
,
probabilities
1900
x1389
717B
R3D3’s Summer Adventure
dp
,
greedy
2700
x142
717A
Festival Organization
combinatorics
,
math
,
number theory
2900
x339
715E
Complete the Permutations
combinatorics
,
fft
,
graphs
,
math
3400
x349
715D
Create a Maze
constructive algorithms
3100
x249
715C
Digit Tree
dfs and similar
,
divide and conquer
,
dsu
,
trees
2700
x2018
715B
Complete The Graph
binary search
,
constructive algorithms
,
graphs
,
shortest paths
2300
x2697
713E
Sonya Partymaker
binary search
,
dp
3300
x349
713D
Animals and Puzzle
binary search
,
data structures
2700
x1093
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