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Codeforces Round 940 (Div. 2)
4 days
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Difficulty:
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greedy
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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Problems
#
Name
1889F
Doremy's Average Tree
data structures
,
dp
,
greedy
,
trees
3500
x67
1868F
LIS?
data structures
,
greedy
,
implementation
3500
x67
1868E
Min-Sum-Max
constructive algorithms
,
dp
,
greedy
3500
x71
1870H
Standard Graph Problem
data structures
,
graphs
,
greedy
,
trees
3500
x76
1349E
Slime and Hats
constructive algorithms
,
dp
,
greedy
3500
x80
1864I
Future Dominators
graphs
,
greedy
3500
x81
1685D2
Permutation Weight (Hard Version)
constructive algorithms
,
greedy
3500
x101
1827F
Copium Permutation
constructive algorithms
,
data structures
,
greedy
3500
x104
1842I
Tenzing and Necklace
divide and conquer
,
dp
,
greedy
3500
x106
1305H
Kuroni the Private Tutor
binary search
,
greedy
3500
x107
1876G
Clubstep
binary search
,
brute force
,
data structures
,
greedy
,
trees
3500
x114
1237G
Balanced Distribution
data structures
,
dp
,
greedy
3500
x116
1685E
The Ultimate LIS Problem
data structures
,
greedy
3500
x134
1696H
Maximum Product?
brute force
,
combinatorics
,
dp
,
greedy
,
implementation
,
math
,
two pointers
3500
x141
1687E
Become Big For Me
combinatorics
,
constructive algorithms
,
greedy
,
math
,
number theory
3500
x210
1456E
XOR-ranges
dp
,
greedy
3500
x265
1637H
Minimize Inversions Number
data structures
,
greedy
,
math
,
sortings
3500
x299
1292E
Rin and The Unknown Flower
constructive algorithms
,
greedy
,
interactive
,
math
3500
x326
1852E
Rivalries
constructive algorithms
,
data structures
,
greedy
3400
x155
1817E
Half-sum
brute force
,
divide and conquer
,
greedy
3400
x246
1693F
I Might Be Wrong
binary search
,
greedy
,
two pointers
3400
x273
1548E
Gregor and the Two Painters
data structures
,
divide and conquer
,
graphs
,
greedy
,
math
3400
x333
1827E
Bus Routes
binary search
,
constructive algorithms
,
dfs and similar
,
greedy
,
trees
3400
x354
1693E
Outermost Maximums
data structures
,
greedy
3400
x368
1097E
Egor and an RPG game
constructive algorithms
,
greedy
3400
x457
737E
Tanya is 5!
graph matchings
,
graphs
,
greedy
,
schedules
3300
x115
1477E
Nezzar and Tournaments
data structures
,
greedy
3300
x116
1209H
Moving Walkways
data structures
,
greedy
,
math
3300
x133
1886F
Diamond Theft
data structures
,
greedy
3300
x157
1329E
Dreamoon Loves AA
binary search
,
greedy
3300
x167
1943E2
MEX Game 2 (Hard Version)
binary search
,
greedy
,
two pointers
3300
x185
1054G
New Road Network
constructive algorithms
,
greedy
,
math
3300
x250
1466H
Finding satisfactory solutions
combinatorics
,
dp
,
graphs
,
greedy
,
math
3300
x255
1726G
A Certain Magical Party
combinatorics
,
data structures
,
greedy
,
sortings
3300
x278
1718D
Permutation for Burenka
data structures
,
graph matchings
,
greedy
,
math
,
trees
3300
x284
1753E
N Machines
binary search
,
brute force
,
greedy
3300
x305
1556H
DIY Tree
graphs
,
greedy
,
math
,
probabilities
3300
x318
1368H1
Breadboard Capacity (easy version)
dp
,
flows
,
greedy
3300
x326
1408H
Rainbow Triples
binary search
,
data structures
,
flows
,
greedy
3300
x347
1416F
Showing Off
flows
,
graph matchings
,
greedy
,
implementation
3300
x355
1610G
AmShZ Wins a Bet
data structures
,
greedy
,
hashing
3300
x360
671E
Organizing a Race
data structures
,
greedy
3300
x392
526G
Spiders Evil Plan
greedy
,
trees
3300
x687
1951I
Growing Trees
binary search
,
constructive algorithms
,
flows
,
graphs
,
greedy
3200
x29
457F
An easy problem about trees
dp
,
games
,
greedy
,
trees
3200
x102
1089J
JS Minification
greedy
,
implementation
3200
x119
1861F
Four Suits
binary search
,
bitmasks
,
flows
,
greedy
3200
x144
1951H
Thanos Snap
binary search
,
dp
,
games
,
greedy
,
trees
3200
x159
1638F
Two Posters
brute force
,
data structures
,
greedy
,
two pointers
3200
x185
1416E
Split
binary search
,
data structures
,
dp
,
greedy
3200
x267
1427F
Boring Card Game
data structures
,
greedy
,
trees
3200
x298
1495E
Qingshan and Daniel
brute force
,
data structures
,
greedy
,
implementation
3200
x394
650E
Clockwork Bomb
data structures
,
dfs and similar
,
dsu
,
greedy
,
trees
3200
x583
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x601
573E
Bear and Bowling
data structures
,
greedy
3200
x1314
1250I
Show Must Go On
binary search
,
brute force
,
greedy
,
shortest paths
3100
x126
662E
To Hack or not to Hack
brute force
,
dp
,
greedy
3100
x129
1895G
Two Characters, Two Colors
binary search
,
data structures
,
dp
,
flows
,
greedy
3100
x167
1190E
Tokitsukaze and Explosion
binary search
,
greedy
3100
x220
1120F
Secret Letters
data structures
,
dp
,
greedy
3100
x246
1805F2
Survival of the Weakest (hard version)
greedy
,
math
,
sortings
,
two pointers
3100
x318
1566G
Four Vertices
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
shortest paths
3100
x326
1067D
Computer Game
dp
,
greedy
,
math
,
probabilities
3100
x350
1647F
Madoka and Laziness
dp
,
greedy
3100
x375
1728F
Fishermen
flows
,
graph matchings
,
greedy
3100
x383
1610H
Squid Game
data structures
,
dfs and similar
,
greedy
,
trees
3100
x391
1936D
Bitwise Paradox
binary search
,
bitmasks
,
data structures
,
greedy
,
two pointers
3100
x392
700D
Huffman Coding on Segment
data structures
,
greedy
3100
x444
1481F
AB Tree
dp
,
greedy
,
trees
3100
x449
626G
Raffles
data structures
,
dp
,
greedy
,
math
3100
x516
1225G
To Make 1
bitmasks
,
constructive algorithms
,
dp
,
greedy
,
number theory
3100
x521
704D
Captain America
flows
,
greedy
3100
x773
1458D
Flip and Reverse
data structures
,
graphs
,
greedy
3100
x962
856F
To Play or not to Play
greedy
3000
x100
1672I
PermutationForces
data structures
,
greedy
3000
x136
167D
Wizards and Roads
data structures
,
divide and conquer
,
graph matchings
,
graphs
,
greedy
3000
x188
1868D
Flower-like Pseudotree
constructive algorithms
,
graphs
,
greedy
,
implementation
,
trees
3000
x243
1181E2
A Story of One Country (Hard)
brute force
,
greedy
,
sortings
3000
x257
1411F
The Thorny Path
greedy
,
math
3000
x316
936D
World of Tank
dp
,
greedy
3000
x321
1776M
Parmigiana With Seafood
binary search
,
dp
,
greedy
,
trees
3000
x337
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x343
1609G
A Stroll Around the Matrix
data structures
,
greedy
,
math
3000
x360
1854E
Game Bundles
brute force
,
constructive algorithms
,
dp
,
greedy
,
math
3000
x373
341E
Candies Game
constructive algorithms
,
greedy
3000
x426
1558E
Down Below
binary search
,
dfs and similar
,
graphs
,
greedy
,
meet-in-the-middle
,
shortest paths
3000
x428
771E
Bear and Rectangle Strips
dp
,
greedy
3000
x437
1381D
The Majestic Brown Tree Snake
dfs and similar
,
dp
,
greedy
,
trees
,
two pointers
3000
x444
1637G
Birthday
constructive algorithms
,
greedy
,
math
3000
x449
335F
Buy One, Get One Free
dp
,
greedy
3000
x454
1534F2
Falling Sand (Hard Version)
dfs and similar
,
dp
,
graphs
,
greedy
3000
x508
1442E
Black, White and Grey Tree
binary search
,
constructive algorithms
,
dfs and similar
,
dp
,
greedy
,
trees
3000
x549
1428G2
Lucky Numbers (Hard Version)
dp
,
greedy
3000
x599
1149D
Abandoning Roads
brute force
,
dp
,
graphs
,
greedy
3000
x659
1446D2
Frequency Problem (Hard Version)
data structures
,
greedy
,
two pointers
3000
x1189
187E
Heaven Tour
data structures
,
greedy
2900
x90
89E
Fire and Ice
greedy
2900
x93
183E
Candy Shop
greedy
2900
x129
1726F
Late For Work (submissions are not allowed)
data structures
,
greedy
,
schedules
,
shortest paths
2900
x131
871E
Restore the Tree
graphs
,
greedy
,
trees
2900
x145
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