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Codeforces Round 988 (Div. 3)
40:55:55
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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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Problems
#
Name
1487A
Arena
implementation
,
sortings
800
x26595
1486F
Pairs of Paths
combinatorics
,
data structures
,
dfs and similar
,
dp
,
trees
2600
x659
1486E
Paired Payment
binary search
,
brute force
,
constructive algorithms
,
dp
,
flows
,
graphs
,
shortest paths
2200
x2958
1486D
Max Median
binary search
,
data structures
,
dp
2100
x7411
1486C2
Guessing the Greatest (hard version)
binary search
,
interactive
1900
x8589
1486C1
Guessing the Greatest (easy version)
binary search
,
interactive
1600
x12337
1486B
Eastern Exhibition
binary search
,
geometry
,
shortest paths
,
sortings
1500
x16125
1486A
Shifting Stacks
greedy
,
implementation
900
x25464
1485F
Copy or Prefix Sum
combinatorics
,
data structures
,
dp
,
sortings
2400
x1996
1485E
Move and Swap
dfs and similar
,
dp
,
greedy
,
trees
2500
x1322
1485D
Multiples and Power Differences
constructive algorithms
,
graphs
,
math
,
number theory
2200
x5189
1485C
Floor and Mod
binary search
,
brute force
,
math
,
number theory
1700
x10039
1485B
Replace and Keep Sorted
dp
,
implementation
,
math
1200
x17139
1485A
Add and Divide
brute force
,
greedy
,
math
,
number theory
1000
x22847
1482H
Exam
data structures
,
string suffix structures
,
trees
3400
x483
1482G
Vabank
binary search
,
interactive
3200
x286
1482F
Useful Edges
graphs
,
shortest paths
2400
x1550
1482E
Skyline Photo
data structures
,
divide and conquer
,
dp
2100
x3245
1482D
Playlist
data structures
,
dsu
,
implementation
,
shortest paths
1900
x3896
1482C
Basic Diplomacy
brute force
,
constructive algorithms
,
greedy
,
implementation
1600
x9434
1482B
Restore Modulo
implementation
,
math
1500
x9223
1482A
Prison Break
math
800
x20489
1481F
AB Tree
dp
,
greedy
,
trees
3100
x487
1481E
Sorting Books
data structures
,
dp
,
greedy
2500
x2127
1481D
AB Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2000
x4583
1481C
Fence Painting
brute force
,
constructive algorithms
,
greedy
1600
x11694
1481B
New Colony
brute force
,
greedy
,
implementation
1100
x19326
1481A
Space Navigation
greedy
,
strings
800
x24990
1480B
The Great Hero
greedy
,
implementation
,
sortings
900
x17260
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x25935
1479E
School Clubs
dp
,
fft
,
math
,
number theory
,
probabilities
3500
x214
1479D
Odd Mineral Resource
binary search
,
bitmasks
,
brute force
,
data structures
,
probabilities
,
trees
2900
x1025
1479C
Continuous City
bitmasks
,
constructive algorithms
2500
x1340
1479B2
Painting the Array II
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
2100
x4087
1479B1
Painting the Array I
constructive algorithms
,
data structures
,
dp
,
greedy
,
implementation
1900
x7006
1479A
Searching Local Minimum
binary search
,
interactive
,
ternary search
1700
x11757
1478C
Nezzar and Symmetric Array
implementation
,
math
,
sortings
1700
x9843
1478B
Nezzar and Lucky Number
brute force
,
dp
,
greedy
,
math
1100
x18349
1478A
Nezzar and Colorful Balls
brute force
,
greedy
800
x26566
1477F
Nezzar and Chocolate Bars
combinatorics
,
fft
,
math
,
probabilities
3500
x134
1477E
Nezzar and Tournaments
data structures
,
greedy
3300
x124
1477D
Nezzar and Hidden Permutations
constructive algorithms
,
dfs and similar
,
graphs
2800
x559
1477C
Nezzar and Nice Beatmap
constructive algorithms
,
geometry
,
greedy
,
math
,
sortings
2200
x2345
1477B
Nezzar and Binary String
data structures
,
greedy
1900
x3253
1477A
Nezzar and Board
constructive algorithms
,
math
,
number theory
1800
x5993
1476G
Minimum Difference
data structures
,
hashing
,
sortings
,
two pointers
3100
x584
1476F
Lanterns
binary search
,
data structures
,
dp
3000
x804
1476E
Pattern Matching
bitmasks
,
data structures
,
dfs and similar
,
graphs
,
hashing
,
sortings
,
strings
2300
x2378
1476D
Journey
dfs and similar
,
dp
,
dsu
,
implementation
1700
x8670
1476C
Longest Simple Cycle
dp
,
graphs
,
greedy
1600
x11431
1476B
Inflation
binary search
,
brute force
,
greedy
,
math
1300
x20118
1476A
K-divisible Sum
binary search
,
constructive algorithms
,
greedy
,
math
1000
x38068
1475G
Strange Beauty
dp
,
math
,
number theory
,
sortings
1900
x6895
1475F
Unusual Matrix
2-sat
,
brute force
,
constructive algorithms
1900
x5361
1475E
Advertising Agency
combinatorics
,
math
,
sortings
1600
x13827
1475D
Cleaning the Phone
binary search
,
dp
,
sortings
,
two pointers
1800
x10234
1475C
Ball in Berland
combinatorics
,
graphs
,
math
1400
x21422
1475B
New Year's Number
brute force
,
dp
,
math
900
x49498
1475A
Odd Divisor
math
,
number theory
900
x62182
1474F
1 2 3 4 ...
dp
,
math
,
matrices
3000
x250
1474E
What Is It?
constructive algorithms
,
greedy
2500
x1351
1474D
Cleaning
data structures
,
dp
,
greedy
,
math
2200
x4010
1474C
Array Destruction
brute force
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
1700
x12801
1474B
Different Divisors
binary search
,
constructive algorithms
,
greedy
,
math
,
number theory
1000
x29257
1474A
Puzzle From the Future
greedy
800
x22635
1473G
Tiles
combinatorics
,
dp
,
fft
,
math
2800
x400
1473F
Strange Set
flows
,
math
2700
x968
1473E
Minimum Path
graphs
,
shortest paths
2400
x3722
1473D
Program
data structures
,
dp
,
implementation
,
strings
1700
x9734
1473C
No More Inversions
constructive algorithms
,
math
1500
x12726
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x31706
1473A
Replacing Elements
greedy
,
implementation
,
math
,
sortings
800
x33984
1472G
Moving to the Capital
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x4768
1472F
New Year's Puzzle
brute force
,
dp
,
graph matchings
,
greedy
,
sortings
2100
x3077
1472E
Correct Placement
binary search
,
data structures
,
dp
,
sortings
,
two pointers
1700
x8126
1472D
Even-Odd Game
dp
,
games
,
greedy
,
sortings
1200
x27681
1472C
Long Jumps
dp
,
graphs
1100
x31619
1472B
Fair Division
dp
,
greedy
,
math
800
x51109
1472A
Cards for Friends
greedy
,
math
800
x42187
1471B
Strange List
brute force
,
greedy
,
implementation
,
math
1100
x19387
1471A
Strange Partition
greedy
,
math
,
number theory
900
x26628
1470F
Strange Covering
divide and conquer
3500
x134
1470E
Strange Permutation
binary search
,
combinatorics
,
data structures
,
dp
,
graphs
,
implementation
,
two pointers
3200
x299
1470D
Strange Housing
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
2200
x3737
1470C
Strange Shuffle
binary search
,
brute force
,
constructive algorithms
,
interactive
2500
x1344
1470B
Strange Definition
bitmasks
,
graphs
,
hashing
,
math
,
number theory
1900
x6337
1470A
Strange Birthday Party
binary search
,
dp
,
greedy
,
sortings
,
two pointers
1300
x22724
1469F
Power Sockets
binary search
,
data structures
,
greedy
2600
x915
1469E
A Bit Similar
bitmasks
,
brute force
,
hashing
,
string suffix structures
,
strings
,
two pointers
2400
x1997
1469D
Ceil Divisions
brute force
,
constructive algorithms
,
math
,
number theory
1700
x9489
1469C
Building a Fence
dp
,
greedy
,
implementation
,
two pointers
1600
x10795
1469B
Red and Blue
dp
,
greedy
1000
x27557
1469A
Regular Bracket Sequence
constructive algorithms
,
greedy
1000
x27597
1468N
Waste Sorting
greedy
,
implementation
900
x8253
1468M
Similar Sets
data structures
,
graphs
,
implementation
2300
x961
1468L
Prime Divisors Selection
binary search
,
greedy
,
math
,
number theory
2700
x328
1468K
The Robot
brute force
,
implementation
1600
x5161
1468J
Road Reform
dsu
,
graphs
,
greedy
1800
x4406
1468I
Plane Tiling
geometry
,
implementation
,
math
2500
x514
1468H
K and Medians
constructive algorithms
,
greedy
,
math
2200
x1828
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