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hashing
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
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geometry
graph matchings
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greedy
hashing
implementation
interactive
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Problems
#
Name
1156G
Optimizer
graphs
,
greedy
,
hashing
,
implementation
2700
x120
1137B
Camp Schedule
greedy
,
hashing
,
strings
1600
x5837
1133D
Zero Quantity Maximization
hashing
,
math
,
number theory
1500
x10928
1129C
Morse Code
binary search
,
data structures
,
dp
,
hashing
,
sortings
,
string suffix structures
,
strings
2400
x896
1109B
Sasha and One More Name
constructive algorithms
,
hashing
,
strings
1800
x4264
1081H
Palindromic Magic
data structures
,
hashing
,
strings
3500
x97
1056E
Check Transcription
brute force
,
data structures
,
hashing
,
strings
2100
x1979
1051E
Vasya and Big Integers
binary search
,
data structures
,
dp
,
hashing
,
strings
2600
x874
1045I
Palindrome Pairs
hashing
,
strings
1600
x4095
1045B
Space Isaac
hashing
,
number theory
2400
x491
1043G
Speckled Band
data structures
,
divide and conquer
,
hashing
,
string suffix structures
,
strings
3500
x215
1017E
The Supersonic Rocket
geometry
,
hashing
,
strings
2400
x810
1003F
Abbreviation
dp
,
hashing
,
strings
2200
x1096
985F
Isomorphic Strings
hashing
,
strings
2300
x1701
963D
Frequency of String
hashing
,
string suffix structures
,
strings
2500
x1803
961F
k-substrings
binary search
,
hashing
,
string suffix structures
2700
x651
958A2
Death Stars (medium)
hashing
,
strings
2000
x876
903E
Swapping Characters
brute force
,
hashing
,
implementation
,
strings
2200
x1253
898F
Restoring the Expression
brute force
,
hashing
,
math
2300
x1122
877F
Ann and Books
data structures
,
flows
,
hashing
2300
x1614
869E
The Untended Antiquity
data structures
,
hashing
2400
x1469
856B
Similar Words
dp
,
hashing
,
strings
,
trees
2300
x476
847L
Berland SU Computer Network
constructive algorithms
,
dfs and similar
,
graphs
,
hashing
,
trees
2400
x315
835D
Palindromic characteristics
brute force
,
dp
,
hashing
,
strings
1900
x3902
825F
String Compression
dp
,
hashing
,
string suffix structures
,
strings
2400
x1327
822E
Liar
binary search
,
dp
,
hashing
,
string suffix structures
2400
x761
794D
Labelling Cities
dfs and similar
,
graphs
,
hashing
2400
x761
786D
Rap God
data structures
,
dfs and similar
,
hashing
,
strings
,
trees
3400
x136
778C
Peterson Polyglot
brute force
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2500
x859
763D
Timofey and a flat tree
data structures
,
graphs
,
hashing
,
shortest paths
,
trees
2900
x514
762C
Two strings
binary search
,
hashing
,
strings
,
two pointers
2100
x2361
757C
Felicity is Coming!
data structures
,
hashing
,
sortings
,
strings
1900
x2306
733D
Kostya the Sculptor
data structures
,
hashing
1600
x4135
727E
Games on a CD
data structures
,
hashing
,
string suffix structures
,
strings
2300
x1115
724C
Ray Tracing
greedy
,
hashing
,
implementation
,
math
,
number theory
,
sortings
1800
x2111
718D
Andrew and Chemistry
dp
,
hashing
,
trees
2900
x382
710F
String Set Queries
brute force
,
data structures
,
hashing
,
interactive
,
string suffix structures
,
strings
2400
x1670
690F2
Tree of Life (medium)
constructive algorithms
,
hashing
,
trees
2700
x78
650D
Zip-line
binary search
,
data structures
,
dp
,
hashing
2600
x1191
639C
Bear and Polynomials
hashing
,
implementation
,
math
2200
x1187
633D
Fibonacci-ish
brute force
,
dp
,
hashing
,
implementation
,
math
2000
x2563
633C
Spy Syndrome 2
data structures
,
dp
,
hashing
,
implementation
,
sortings
,
string suffix structures
,
strings
1900
x2630
631D
Messenger
data structures
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x1986
613E
Puzzle Lover
dp
,
hashing
,
strings
3200
x453
611D
New Year and Ancient Prophecy
dp
,
hashing
,
strings
2000
x2512
607C
Marbles
hashing
,
strings
2500
x777
601D
Acyclic Organic Compounds
data structures
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2400
x1088
580E
Kefa and Watch
data structures
,
hashing
,
strings
2500
x1943
574B
Bear and Three Musketeers
brute force
,
dfs and similar
,
graphs
,
hashing
1500
x7603
567E
President and Roads
dfs and similar
,
graphs
,
hashing
,
shortest paths
2200
x1640
559B
Equivalent Strings
divide and conquer
,
hashing
,
sortings
,
strings
1700
x10362
542D
Superhero's Job
dfs and similar
,
dp
,
hashing
,
math
,
number theory
2600
x496
535D
Tavas and Malekas
greedy
,
hashing
,
string suffix structures
,
strings
1900
x3766
534F
Simplified Nonogram
bitmasks
,
dp
,
hashing
,
meet-in-the-middle
2400
x442
534E
Berland Local Positioning System
constructive algorithms
,
greedy
,
hashing
,
implementation
2400
x341
533F
Encoding
hashing
,
string suffix structures
,
strings
2400
x866
533E
Correcting Mistakes
constructive algorithms
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x2170
526D
Om Nom and Necklace
hashing
,
string suffix structures
,
strings
2200
x2097
525A
Vitaliy and Pie
greedy
,
hashing
,
strings
1100
x13860
524F
And Yet Another Bracket Sequence
data structures
,
greedy
,
hashing
,
string suffix structures
,
strings
2700
x521
514C
Watto and Mechanism
binary search
,
data structures
,
hashing
,
string suffix structures
,
strings
2000
x6474
504E
Misha and LCP on Tree
binary search
,
dfs and similar
,
hashing
,
string suffix structures
,
trees
3000
x871
486E
LIS of Sequence
data structures
,
dp
,
greedy
,
hashing
,
math
2200
x2019
486B
OR in Matrix
greedy
,
hashing
,
implementation
1300
x16926
467D
Fedor and Essay
dfs and similar
,
dp
,
graphs
,
hashing
,
strings
2400
x1766
463C
Gargari and Bishops
greedy
,
hashing
,
implementation
1900
x8369
452F
Permutation
data structures
,
divide and conquer
,
hashing
2700
x1365
444D
DZY Loves Strings
binary search
,
hashing
,
strings
,
two pointers
2500
x753
425D
Sereja and Squares
binary search
,
data structures
,
hashing
2300
x1387
407D
Largest Submatrix 3
dp
,
hashing
2700
x539
356E
Xenia and String Problem
dp
,
hashing
,
implementation
,
string suffix structures
,
strings
3000
x400
350D
Looking for Owls
binary search
,
data structures
,
geometry
,
hashing
,
sortings
2400
x256
319D
Have You Ever Heard About the Word?
greedy
,
hashing
,
string suffix structures
,
strings
2800
x612
316G1
Good Substrings
hashing
,
strings
1700
x927
291E
Tree-String Problem
*special problem
,
dfs and similar
,
hashing
,
strings
2000
x1271
245H
Queries for Number of Palindromes
dp
,
hashing
,
strings
1800
x5961
242C
King's Path
dfs and similar
,
graphs
,
hashing
,
shortest paths
1800
x8038
228C
Fractal Detector
dp
,
hashing
2000
x441
213E
Two Permutations
data structures
,
hashing
,
strings
2700
x766
212B
Polycarpus is Looking for Good Substrings
bitmasks
,
hashing
,
implementation
2300
x322
196D
The Next Good String
data structures
,
greedy
,
hashing
,
strings
2800
x519
190E
Counter Attack
data structures
,
dsu
,
graphs
,
hashing
,
sortings
2100
x1432
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x7819
154C
Double Profiles
graphs
,
hashing
,
sortings
2300
x2675
128B
String
brute force
,
constructive algorithms
,
hashing
,
implementation
,
string suffix structures
,
strings
2100
x2458
126B
Password
binary search
,
dp
,
hashing
,
string suffix structures
,
strings
1700
x17771
119D
String Transformation
hashing
,
strings
2500
x473
113B
Petr#
brute force
,
data structures
,
hashing
,
strings
2000
x2721
82B
Sets
constructive algorithms
,
hashing
,
implementation
1700
x2017
79C
Beaver
data structures
,
dp
,
greedy
,
hashing
,
strings
,
two pointers
1800
x1716
65D
Harry Potter and the Sorting Hat
brute force
,
dfs and similar
,
hashing
2200
x419
54B
Cutting Jigsaw Puzzle
hashing
,
implementation
1800
x737
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x2788
30E
Tricky and Clever Password
binary search
,
constructive algorithms
,
data structures
,
greedy
,
hashing
,
strings
2800
x673
28D
Don't fear, DravDe is kind
binary search
,
data structures
,
dp
,
hashing
2400
x582
25E
Test
hashing
,
strings
2200
x2183
19C
Deletion of Repeats
greedy
,
hashing
,
string suffix structures
2200
x1045
7D
Palindrome Degree
hashing
,
strings
2200
x3511
4C
Registration System
data structures
,
hashing
,
implementation
1300
x77188
2A
Winner
hashing
,
implementation
1500
x25030
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