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strings
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
979D
Kuro and GCD and XOR and SUM
binary search
,
bitmasks
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
math
,
number theory
,
strings
,
trees
2200
x1684
978B
File Name
greedy
,
strings
800
x35006
977B
Two-gram
implementation
,
strings
900
x36783
975A
Aramic script
implementation
,
strings
900
x8968
965E
Short Code
data structures
,
dp
,
greedy
,
strings
,
trees
2200
x1327
963D
Frequency of String
hashing
,
string suffix structures
,
strings
2500
x1803
958A2
Death Stars (medium)
hashing
,
strings
2000
x876
955D
Scissors
brute force
,
strings
2600
x458
954B
String Typing
implementation
,
strings
1400
x7098
946C
String Transformation
greedy
,
strings
1300
x8764
940C
Phone Numbers
constructive algorithms
,
implementation
,
strings
1500
x5609
939D
Love Rescue
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1600
x7135
936C
Lock Puzzle
constructive algorithms
,
implementation
,
strings
2300
x1150
932G
Palindrome Partition
dp
,
string suffix structures
,
strings
2900
x875
930B
Game with String
implementation
,
probabilities
,
strings
1600
x2593
928D
Autocompletion
*special problem
,
strings
,
trees
1900
x801
928A
Login Verification
*special problem
,
strings
1200
x3335
923D
Picking Strings
constructive algorithms
,
implementation
,
strings
2500
x1155
923C
Perfect Security
data structures
,
greedy
,
strings
,
trees
1800
x4154
918B
Radio Station
implementation
,
strings
900
x15680
917E
Upside Down
data structures
,
string suffix structures
,
strings
,
trees
3400
x122
914F
Substrings in a String
bitmasks
,
brute force
,
data structures
,
string suffix structures
,
strings
3000
x1443
906E
Reverses
dp
,
string suffix structures
,
strings
3300
x429
906A
Shockers
implementation
,
strings
1600
x4094
903E
Swapping Characters
brute force
,
hashing
,
implementation
,
strings
2200
x1253
900E
Maximum Questions
data structures
,
dp
,
strings
2100
x1028
899F
Letters Removing
data structures
,
strings
2100
x1574
898C
Phone Numbers
implementation
,
strings
1400
x5139
895D
String Mark
combinatorics
,
math
,
strings
2100
x1086
883H
Palindromic Cut
brute force
,
implementation
,
strings
1800
x1564
883E
Field of Wonders
implementation
,
strings
1500
x1876
877A
Alex and broken contest
implementation
,
strings
1100
x10697
873F
Forbidden Indices
dsu
,
string suffix structures
,
strings
2400
x1291
868D
Huge Strings
bitmasks
,
brute force
,
dp
,
implementation
,
strings
2200
x890
868A
Bark to Unlock
brute force
,
implementation
,
strings
900
x8520
864B
Polycarp and Letters
brute force
,
implementation
,
strings
1000
x8873
862F
Mahmoud and Ehab and the final stage
data structures
,
strings
2900
x197
856B
Similar Words
dp
,
hashing
,
strings
,
trees
2300
x476
855A
Tom Riddle's Diary
brute force
,
implementation
,
strings
800
x20114
844A
Diversity
greedy
,
implementation
,
strings
1000
x10371
835D
Palindromic characteristics
brute force
,
dp
,
hashing
,
strings
1900
x3902
832B
Petya and Exam
implementation
,
strings
1600
x4327
831B
Keyboard Layouts
implementation
,
strings
800
x14062
827E
Rusty String
fft
,
math
,
strings
2700
x791
827C
DNA Evolution
data structures
,
strings
2100
x1612
827A
String Reconstruction
data structures
,
greedy
,
sortings
,
strings
1700
x3938
825F
String Compression
dp
,
hashing
,
string suffix structures
,
strings
2400
x1327
822B
Crossword solving
brute force
,
implementation
,
strings
1000
x9319
814C
An impassioned circulation of affection
brute force
,
dp
,
strings
,
two pointers
1600
x6303
808G
Anthem of Berland
dp
,
strings
2300
x2415
802H
Fake News (medium)
constructive algorithms
,
strings
2200
x426
802G
Fake News (easy)
implementation
,
strings
800
x6715
801B
Valued Keys
constructive algorithms
,
greedy
,
strings
900
x10011
798B
Mike and strings
brute force
,
dp
,
strings
1300
x8265
798A
Mike and palindrome
brute force
,
constructive algorithms
,
strings
1000
x21056
797C
Minimal string
data structures
,
greedy
,
strings
1700
x6260
786D
Rap God
data structures
,
dfs and similar
,
hashing
,
strings
,
trees
3400
x136
785A
Anton and Polyhedrons
implementation
,
strings
800
x82234
780D
Innokenty and a Football League
2-sat
,
graphs
,
greedy
,
implementation
,
shortest paths
,
strings
1900
x2840
778C
Peterson Polyglot
brute force
,
dfs and similar
,
dsu
,
hashing
,
strings
,
trees
2500
x859
778A
String Game
binary search
,
greedy
,
strings
1700
x11102
777D
Cloud of Hashtags
binary search
,
greedy
,
implementation
,
strings
1800
x4912
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x11830
774K
Stepan and Vowels
*special problem
,
implementation
,
strings
1600
x1256
766C
Mahmoud and a Message
brute force
,
dp
,
greedy
,
strings
1700
x4314
766A
Mahmoud and Longest Uncommon Subsequence
constructive algorithms
,
strings
1000
x28907
765B
Code obfuscation
greedy
,
implementation
,
strings
1100
x7023
762C
Two strings
binary search
,
hashing
,
strings
,
two pointers
2100
x2362
758D
Ability To Convert
constructive algorithms
,
dp
,
greedy
,
math
,
strings
2000
x2686
757C
Felicity is Coming!
data structures
,
hashing
,
sortings
,
strings
1900
x2306
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10918
754E
Dasha and cyclic table
bitmasks
,
brute force
,
fft
,
strings
,
trees
2600
x480
754C
Vladik and chat
brute force
,
constructive algorithms
,
dp
,
implementation
,
strings
2200
x906
748B
Santa Claus and Keyboard Check
implementation
,
strings
1500
x5272
747E
Comments
dfs and similar
,
expression parsing
,
implementation
,
strings
1700
x1938
747B
Mammoth's Genome Decoding
implementation
,
strings
900
x8540
746B
Decoding
implementation
,
strings
900
x26226
745A
Hongcow Learns the Cyclic Shift
implementation
,
strings
900
x10298
744E
Hongcow Masters the Cyclic Shift
strings
,
two pointers
3200
x132
735A
Ostap and Grasshopper
implementation
,
strings
800
x12298
734A
Anton and Danik
implementation
,
strings
800
x140323
731A
Night at the Museum
implementation
,
strings
800
x43169
729A
Interview with Oleg
implementation
,
strings
900
x7268
727E
Games on a CD
data structures
,
hashing
,
string suffix structures
,
strings
2300
x1115
727B
Bill Total Value
expression parsing
,
implementation
,
strings
1600
x1965
725C
Hidden Word
brute force
,
constructive algorithms
,
implementation
,
strings
1600
x2603
724D
Dense Subsequence
data structures
,
greedy
,
strings
1900
x2252
723B
Text Document Analysis
expression parsing
,
implementation
,
strings
1100
x10066
722D
Generating Sets
binary search
,
data structures
,
dfs and similar
,
greedy
,
strings
,
trees
1900
x3083
722B
Verse Pattern
implementation
,
strings
1200
x6345
721B
Passwords
implementation
,
math
,
sortings
,
strings
1100
x11972
712B
Memory and Trident
implementation
,
strings
1100
x9624
710F
String Set Queries
brute force
,
data structures
,
hashing
,
interactive
,
string suffix structures
,
strings
2400
x1670
708A
Letters Cyclic Shift
constructive algorithms
,
greedy
,
implementation
,
strings
1200
x8857
706C
Hard problem
dp
,
strings
1600
x15630
701C
They Are Everywhere
binary search
,
strings
,
two pointers
1500
x13754
700E
Cool Slogans
string suffix structures
,
strings
3300
x1125
697B
Barnicle
brute force
,
implementation
,
math
,
strings
1400
x5664
696D
Legen...
data structures
,
dp
,
matrices
,
strings
2500
x1234
691C
Exponential notation
implementation
,
strings
1800
x2482
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