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Codeforces Round sponsored by NEAR (Div. 1 + Div. 2)
40:41:28
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data structures
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
1062E
Company
binary search
,
data structures
,
dfs and similar
,
greedy
,
trees
2300
x1737
1061D
TV Shows
data structures
,
greedy
,
implementation
,
sortings
2000
x2308
1061C
Multiplicity
data structures
,
dp
,
implementation
,
math
,
number theory
1700
x8565
1060G
Balls and Pockets
data structures
3400
x145
1059E
Split the Tree
binary search
,
data structures
,
dp
,
greedy
,
trees
2400
x1369
1056H
Detect Robots
data structures
,
strings
3200
x154
1056G
Take Metro
brute force
,
data structures
,
graphs
2900
x247
1056E
Check Transcription
brute force
,
data structures
,
hashing
,
strings
2100
x2192
1051G
Distinctification
data structures
,
dsu
,
greedy
2900
x381
1051E
Vasya and Big Integers
binary search
,
data structures
,
dp
,
hashing
,
strings
2600
x913
1045J
Moonwalk challenge
data structures
,
strings
,
trees
2600
x169
1045G
AI robots
data structures
2200
x1587
1045A
Last chance
data structures
,
flows
,
graph matchings
,
graphs
,
trees
2500
x382
1044F
DFS
data structures
2700
x551
1044D
Deduction Queries
data structures
,
dsu
2400
x989
1043G
Speckled Band
data structures
,
divide and conquer
,
hashing
,
string suffix structures
,
strings
3500
x223
1042F
Leaf Sets
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2400
x1256
1042D
Petya and Array
data structures
,
divide and conquer
,
two pointers
1800
x5912
1041F
Ray in the tube
data structures
,
divide and conquer
,
dp
,
math
2500
x1460
1041E
Tree Reconstruction
constructive algorithms
,
data structures
,
graphs
,
greedy
1900
x3545
1041D
Glider
binary search
,
data structures
,
two pointers
1700
x5865
1041C
Coffee Break
binary search
,
data structures
,
greedy
,
two pointers
1600
x9354
1039E
Summer Oenothera Exhibition
data structures
3400
x268
1039D
You Are Given a Tree
data structures
,
dp
,
trees
2800
x1687
1039A
Timetable
constructive algorithms
,
data structures
,
greedy
,
math
2300
x773
1037H
Security
data structures
,
string suffix structures
3200
x1003
1037F
Maximum Reduction
combinatorics
,
data structures
,
math
2500
x988
1034D
Intervals of Intervals
binary search
,
data structures
,
two pointers
3500
x444
1030F
Putting Boxes Together
data structures
2500
x795
1028D
Order book
combinatorics
,
data structures
,
greedy
2100
x1726
1023G
Pisces
data structures
,
flows
,
trees
3400
x114
1023D
Array Restoration
constructive algorithms
,
data structures
1700
x3965
1019E
Raining season
data structures
,
divide and conquer
,
trees
3200
x331
1017G
The Tree
data structures
3200
x855
1017D
The Wu
bitmasks
,
brute force
,
data structures
1900
x3401
1010E
Store
data structures
2700
x325
1009F
Dominant Indices
data structures
,
dsu
,
trees
2300
x5290
1007D
Ants
2-sat
,
data structures
,
trees
3200
x264
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x12061
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x20671
1004F
Sonya and Bitwise OR
bitmasks
,
data structures
,
divide and conquer
2600
x718
1004E
Sonya and Ice Cream
binary search
,
data structures
,
dp
,
greedy
,
shortest paths
,
trees
2400
x1027
1000G
Two-Paths
data structures
,
dp
,
trees
2700
x571
1000F
One Occurrence
data structures
,
divide and conquer
2400
x3682
1000C
Covered Points Count
data structures
,
implementation
,
sortings
1700
x6566
999D
Equalize the Remainders
data structures
,
greedy
,
implementation
1900
x4258
997E
Good Subsegments
data structures
3000
x1108
995C
Leaving the Bar
brute force
,
data structures
,
geometry
,
greedy
,
math
,
sortings
2300
x1865
992E
Nastya and King-Shamans
binary search
,
data structures
2500
x1334
986E
Prince's Problem
brute force
,
data structures
,
math
,
number theory
,
trees
2800
x760
985E
Pencils and Boxes
binary search
,
data structures
,
dp
,
greedy
,
two pointers
2100
x3495
983E
NN country
binary search
,
data structures
,
trees
2800
x909
983D
Arkady and Rectangles
data structures
3300
x365
982D
Shark
brute force
,
data structures
,
dsu
,
trees
1900
x2270
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8223
981H
K Paths
combinatorics
,
data structures
,
dp
,
fft
,
math
3100
x268
981G
Magic multisets
data structures
2500
x631
981E
Addition on Segments
bitmasks
,
data structures
,
divide and conquer
,
dp
2200
x2051
980E
The Number Games
data structures
,
greedy
,
trees
2200
x1895
979D
Kuro and GCD and XOR and SUM
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
number theory
,
strings
,
trees
2200
x1740
978F
Mentors
binary search
,
data structures
,
implementation
1500
x8152
965E
Short Code
data structures
,
dp
,
greedy
,
strings
,
trees
2200
x1353
962G
Visible Black Areas
data structures
,
dsu
,
geometry
,
trees
2800
x161
962D
Merge Equals
data structures
,
implementation
1600
x6756
961E
Tufurama
data structures
1900
x3487
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x20038
960H
Santa's Gift
data structures
,
trees
3100
x260
960F
Pathwalks
data structures
,
dp
,
graphs
2100
x2893
960B
Minimize the error
data structures
,
greedy
,
sortings
1500
x7642
958C3
Encryption (hard)
data structures
,
dp
2500
x497
958B2
Maximum Control (medium)
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
2200
x625
954G
Castle Defense
binary search
,
data structures
,
greedy
,
two pointers
2000
x2106
946G
Almost Increasing Array
data structures
,
dp
2500
x657
940F
Machine Learning
brute force
,
data structures
2600
x2498
940E
Cashback
data structures
,
dp
,
greedy
,
math
2000
x3583
939F
Cutlet
data structures
,
dp
2400
x909
938G
Shortest Path Queries
bitmasks
,
data structures
,
dsu
,
graphs
2900
x870
938D
Buy a Ticket
data structures
,
graphs
,
shortest paths
2000
x5440
936E
Iqea
data structures
,
dfs and similar
,
divide and conquer
,
dsu
,
shortest paths
,
trees
3400
x185
935F
Fafa and Array
data structures
,
greedy
2600
x360
932F
Escape Through Leaf
data structures
,
dp
,
geometry
2700
x2772
932B
Recursive Queries
binary search
,
data structures
,
dfs and similar
1300
x7942
930E
Coins Exhibition
data structures
,
dp
,
math
2900
x412
930D
Game with Tokens
data structures
,
games
,
implementation
2500
x403
930C
Teodor is not a liar!
data structures
,
dp
1900
x2089
926J
Segments
data structures
2100
x378
926E
Merge Equal Elements
constructive algorithms
,
data structures
1900
x916
925E
May Holidays
data structures
,
trees
2900
x377
924C
Riverside Curio
data structures
,
dp
,
greedy
1700
x3735
923C
Perfect Security
data structures
,
greedy
,
strings
,
trees
1800
x4209
923B
Producing Snow
binary search
,
data structures
1600
x7216
920F
SUM and REPLACE
brute force
,
data structures
,
dsu
,
number theory
2000
x6454
920E
Connected Components?
data structures
,
dfs and similar
,
dsu
,
graphs
2100
x6103
917E
Upside Down
data structures
,
string suffix structures
,
strings
,
trees
3400
x125
916E
Jamie and Tree
data structures
,
trees
2400
x1618
916D
Jamie and To-do List
data structures
,
interactive
,
trees
2200
x503
915F
Imbalance Value of a Tree
data structures
,
dsu
,
graphs
,
trees
2400
x2360
915E
Physical Education Lessons
data structures
,
implementation
,
sortings
2300
x4130
914F
Substrings in a String
bitmasks
,
brute force
,
data structures
,
string suffix structures
,
strings
3000
x1540
914E
Palindromes in a Tree
bitmasks
,
data structures
,
divide and conquer
,
trees
2400
x1436
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