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Codeforces Round 986 (Div. 2)
08:42:41
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Difficulty:
—
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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Custom test
Problems
#
Name
626G
Raffles
data structures
,
dp
,
greedy
,
math
3100
x531
626C
Block Towers
brute force
,
greedy
,
math
,
number theory
1600
x4351
625E
Frog Fights
data structures
,
greedy
2800
x347
625B
War of the Corporations
constructive algorithms
,
greedy
,
strings
1200
x10450
624B
Making a String
greedy
,
sortings
1100
x7997
623D
Birthday
greedy
,
math
,
probabilities
2700
x499
623B
Array GCD
dp
,
greedy
,
number theory
2300
x2161
622E
Ants in Leaves
dfs and similar
,
greedy
,
sortings
,
trees
2200
x2095
620C
Pearls in a Row
greedy
1500
x6825
618D
Hamiltonian Spanning Tree
dfs and similar
,
dp
,
graph matchings
,
greedy
,
trees
2200
x1734
616B
Dinner with Emma
games
,
greedy
1000
x11972
615C
Running Track
dp
,
greedy
,
strings
,
trees
2000
x2328
613B
Skills
binary search
,
brute force
,
dp
,
greedy
,
sortings
,
two pointers
1900
x2233
612D
The Union of k-Segments
greedy
,
sortings
1800
x3888
611E
New Year and Three Musketeers
data structures
,
greedy
,
sortings
2400
x869
609F
Frogs and mosquitoes
data structures
,
greedy
2500
x1261
609D
Gadgets for dollars and pounds
binary search
,
greedy
,
two pointers
2000
x2751
609A
USB Flash Drives
greedy
,
implementation
,
sortings
800
x17394
605A
Sorting Railway Cars
constructive algorithms
,
greedy
1600
x7146
604B
More Cowbell
binary search
,
greedy
1400
x8491
603A
Alternative Thinking
dp
,
greedy
,
math
1600
x7685
600C
Make Palindrome
constructive algorithms
,
greedy
,
strings
1800
x6265
597B
Restaurant
dp
,
greedy
,
sortings
1600
x4863
596C
Wilbur and Points
combinatorics
,
greedy
,
sortings
1700
x2256
596B
Wilbur and Array
greedy
,
implementation
1100
x10373
594C
Edo and Magnets
brute force
,
greedy
,
implementation
,
two pointers
2300
x690
588A
Duff and Meat
greedy
900
x22959
587A
Duff and Weight Lifting
greedy
1500
x7588
584E
Anton and Ira
constructive algorithms
,
greedy
,
math
2300
x1428
584C
Marina and Vasya
constructive algorithms
,
greedy
,
strings
1700
x6241
583B
Robot's Task
greedy
,
implementation
1200
x8733
582A
GCD Table
constructive algorithms
,
greedy
,
number theory
1700
x7813
581E
Kojiro and Furrari
dp
,
greedy
2800
x191
578E
Walking!
constructive algorithms
,
greedy
2700
x640
578D
LCS Again
dp
,
greedy
2700
x866
578B
"Or" Game
brute force
,
greedy
1700
x5230
576C
Points on Plane
constructive algorithms
,
divide and conquer
,
geometry
,
greedy
,
sortings
2100
x3473
576B
Invariance of Tree
constructive algorithms
,
dfs and similar
,
greedy
,
trees
2100
x1812
575F
Bulbo
dp
,
greedy
2100
x1038
574A
Bear and Elections
greedy
,
implementation
1200
x9093
573E
Bear and Bowling
data structures
,
greedy
3200
x1754
572B
Order Book
data structures
,
greedy
,
implementation
,
sortings
1300
x7000
571C
CNF 2
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2500
x669
571B
Minimization
dp
,
greedy
,
sortings
2000
x2651
570B
Simple Game
constructive algorithms
,
games
,
greedy
,
implementation
,
math
1300
x16187
569B
Inventory
greedy
,
math
1200
x7108
568C
New Language
2-sat
,
greedy
2600
x865
567D
One-Dimensional Battle Ships
binary search
,
data structures
,
greedy
,
sortings
1700
x4813
567A
Lineland Mail
greedy
,
implementation
900
x32418
566B
Replicating Processes
constructive algorithms
,
greedy
2600
x273
558C
Amr and Chemistry
brute force
,
graphs
,
greedy
,
math
,
shortest paths
1900
x3993
557C
Arthur and Table
brute force
,
data structures
,
dp
,
greedy
,
math
,
sortings
1900
x4023
557A
Ilya and Diplomas
greedy
,
implementation
,
math
1100
x8272
556A
Case of the Zeros and Ones
greedy
900
x40225
555B
Case of Fugitive
data structures
,
greedy
,
sortings
2000
x3748
554B
Ohana Cleans Up
brute force
,
greedy
,
strings
1200
x9991
553D
Nudist Beach
binary search
,
graphs
,
greedy
2300
x1001
553B
Kyoya and Permutation
binary search
,
combinatorics
,
constructive algorithms
,
greedy
,
implementation
,
math
1900
x2120
552E
Vanya and Brackets
brute force
,
dp
,
expression parsing
,
greedy
,
implementation
,
strings
2100
x1630
552C
Vanya and Scales
brute force
,
dp
,
greedy
,
math
,
meet-in-the-middle
,
number theory
1900
x5489
551C
GukiZ hates Boxes
binary search
,
greedy
2200
x3594
550E
Brackets in Implications
constructive algorithms
,
greedy
,
implementation
,
math
2200
x1396
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x38193
549G
Happy Line
constructive algorithms
,
greedy
,
sortings
2200
x2450
549D
Haar Features
greedy
,
implementation
1900
x2141
549B
Looksery Party
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
2300
x1503
548B
Mike and Fun
brute force
,
dp
,
greedy
,
implementation
1400
x8459
547A
Mike and Frog
brute force
,
greedy
,
implementation
,
math
2200
x2593
546B
Soldier and Badges
brute force
,
greedy
,
implementation
,
sortings
1200
x17637
545E
Paths and Trees
graphs
,
greedy
,
shortest paths
2000
x4664
545D
Queue
greedy
,
implementation
,
sortings
1300
x25281
545C
Woodcutters
dp
,
greedy
1500
x28210
545B
Equidistant String
greedy
1100
x11656
542F
Quest
dp
,
greedy
2100
x927
540B
School Marks
greedy
,
implementation
1700
x4710
538H
Summer Dichotomy
2-sat
,
data structures
,
dfs and similar
,
greedy
3200
x660
538C
Tourist's Notes
binary search
,
brute force
,
greedy
,
implementation
,
math
1600
x5827
538B
Quasi Binary
constructive algorithms
,
dp
,
greedy
,
implementation
1400
x18126
535D
Tavas and Malekas
greedy
,
hashing
,
string suffix structures
,
strings
1900
x3959
535C
Tavas and Karafs
binary search
,
greedy
,
math
1900
x3797
534E
Berland Local Positioning System
constructive algorithms
,
greedy
,
hashing
,
implementation
2400
x351
534D
Handshakes
binary search
,
constructive algorithms
,
data structures
,
greedy
1900
x2416
534B
Covered Path
dp
,
greedy
,
math
1400
x10316
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2266
533C
Board Game
games
,
greedy
,
implementation
,
math
1700
x2197
533A
Berland Miners
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
3000
x391
529B
Group Photo 2 (online mirror version)
brute force
,
greedy
,
sortings
1900
x873
527D
Clique Problem
data structures
,
dp
,
greedy
,
implementation
,
sortings
1800
x4801
527B
Error Correct System
greedy
1500
x3886
526G
Spiders Evil Plan
greedy
,
trees
3300
x747
526C
Om Nom and Candies
brute force
,
greedy
,
math
2000
x2522
526B
Om Nom and Dark Park
dfs and similar
,
greedy
,
implementation
1400
x4504
525D
Arthur and Walls
constructive algorithms
,
data structures
,
graphs
,
greedy
,
shortest paths
2400
x1785
525C
Ilya and Sticks
greedy
,
math
,
sortings
1600
x5824
525B
Pasha and String
constructive algorithms
,
greedy
,
math
,
strings
1400
x9434
525A
Vitaliy and Pie
greedy
,
hashing
,
strings
1100
x14649
524F
And Yet Another Bracket Sequence
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
2700
x534
524D
Social Network
greedy
,
two pointers
2100
x956
524B
Фото на память - 2 (round version)
dp
,
greedy
1700
x1463
523C
Name Quest
*special problem
,
greedy
1400
x2501
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