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Contest is running
Codeforces Round 943 (Div. 3)
01:31:14
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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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Custom test
Problems
#
Name
1182C
Beautiful Lyrics
data structures
,
greedy
,
strings
1700
x4380
1799C
Double Lexicographically Minimum
greedy
,
strings
1700
x5441
1092C
Prefixes and Suffixes
strings
1700
x5773
464A
No to Palindromes!
greedy
,
strings
1700
x5811
584C
Marina and Vasya
constructive algorithms
,
greedy
,
strings
1700
x6062
797C
Minimal string
data structures
,
greedy
,
strings
1700
x6252
1690F
Shifting String
graphs
,
math
,
number theory
,
strings
1700
x6785
1660F1
Promising String (easy version)
brute force
,
implementation
,
math
,
strings
1700
x6973
632C
The Smallest String Concatenation
sortings
,
strings
1700
x7205
1153C
Serval and Parenthesis Sequence
greedy
,
strings
1700
x7262
1688C
Manipulating History
constructive algorithms
,
greedy
,
strings
1700
x7886
1948D
Tandem Repeats?
brute force
,
strings
,
two pointers
1700
x8074
1268A
Long Beautiful Integer
constructive algorithms
,
greedy
,
implementation
,
strings
1700
x8288
490C
Hacking Cypher
brute force
,
math
,
number theory
,
strings
1700
x8900
1301C
Ayoub's function
binary search
,
combinatorics
,
greedy
,
math
,
strings
1700
x9054
1295B
Infinite Prefixes
math
,
strings
1700
x9068
1473D
Program
data structures
,
dp
,
implementation
,
strings
1700
x9304
1383A
String Transformation 1
dsu
,
graphs
,
greedy
,
sortings
,
strings
,
trees
,
two pointers
1700
x10228
559B
Equivalent Strings
divide and conquer
,
hashing
,
sortings
,
strings
1700
x10357
778A
String Game
binary search
,
greedy
,
strings
1700
x11089
1628B
Peculiar Movie Preferences
greedy
,
strings
1700
x11177
1360F
Spy-string
bitmasks
,
brute force
,
constructive algorithms
,
dp
,
hashing
,
strings
1700
x11836
1381A2
Prefix Flip (Hard Version)
constructive algorithms
,
data structures
,
implementation
,
strings
,
two pointers
1700
x12745
126B
Password
binary search
,
dp
,
hashing
,
string suffix structures
,
strings
1700
x17706
774K
Stepan and Vowels
*special problem
,
implementation
,
strings
1600
x1256
95A
Hockey
implementation
,
strings
1600
x1642
70B
Text Messaging
expression parsing
,
greedy
,
strings
1600
x1716
727B
Bill Total Value
expression parsing
,
implementation
,
strings
1600
x1964
113A
Grammar Lessons
implementation
,
strings
1600
x2231
725C
Hidden Word
brute force
,
constructive algorithms
,
implementation
,
strings
1600
x2588
930B
Game with String
implementation
,
probabilities
,
strings
1600
x2590
260B
Ancient Prophesy
brute force
,
implementation
,
strings
1600
x3736
1045I
Palindrome Pairs
hashing
,
strings
1600
x4069
906A
Shockers
implementation
,
strings
1600
x4093
832B
Petya and Exam
implementation
,
strings
1600
x4326
691B
s-palindrome
implementation
,
strings
1600
x4701
600A
Extract Numbers
implementation
,
strings
1600
x4855
1137B
Camp Schedule
greedy
,
hashing
,
strings
1600
x5829
814C
An impassioned circulation of affection
brute force
,
dp
,
strings
,
two pointers
1600
x6299
1243B2
Character Swap (Hard Version)
strings
1600
x6848
1781C
Equal Frequencies
brute force
,
constructive algorithms
,
greedy
,
implementation
,
sortings
,
strings
1600
x7025
939D
Love Rescue
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1600
x7114
1778C
Flexible String
bitmasks
,
brute force
,
strings
1600
x7637
1714D
Color with Occurrences
brute force
,
data structures
,
dp
,
greedy
,
strings
1600
x8582
518A
Vitaly and Strings
constructive algorithms
,
strings
1600
x9106
1861C
Queries for the Array
data structures
,
dfs and similar
,
implementation
,
strings
,
trees
1600
x9430
1680C
Binary String
binary search
,
greedy
,
strings
,
two pointers
1600
x9485
1321C
Remove Adjacent
brute force
,
constructive algorithms
,
greedy
,
strings
1600
x9500
1822E
Making Anti-Palindromes
greedy
,
math
,
strings
1600
x9663
1849C
Binary String Copying
binary search
,
brute force
,
data structures
,
hashing
,
strings
1600
x9802
1886C
Decreasing String
implementation
,
strings
1600
x10165
1511D
Min Cost String
brute force
,
constructive algorithms
,
graphs
,
greedy
,
strings
1600
x11032
1555D
Say No to Palindromes
brute force
,
constructive algorithms
,
dp
,
strings
1600
x11728
165C
Another Problem on Strings
binary search
,
brute force
,
dp
,
math
,
strings
,
two pointers
1600
x11863
1537E1
Erase and Extend (Easy Version)
binary search
,
brute force
,
dp
,
greedy
,
hashing
,
implementation
,
string suffix structures
,
strings
,
two pointers
1600
x12231
1295C
Obtain The String
dp
,
greedy
,
strings
1600
x12541
1348C
Phoenix and Distribution
constructive algorithms
,
greedy
,
sortings
,
strings
1600
x14179
706C
Hard problem
dp
,
strings
1600
x15609
100D
World of Mouth
*special problem
,
strings
1500
x297
883E
Field of Wonders
implementation
,
strings
1500
x1876
638B
Making Genome in Berland
*special problem
,
dfs and similar
,
strings
1500
x1926
250B
Restoring IPv6
implementation
,
strings
1500
x1945
121B
Lucky Transformation
strings
1500
x2525
39J
Spelling Check
hashing
,
implementation
,
strings
1500
x2785
75B
Facetook Priority Wall
expression parsing
,
implementation
,
strings
1500
x3209
278B
New Problem
brute force
,
strings
1500
x3417
91A
Newspaper Headline
greedy
,
strings
1500
x3449
358B
Dima and Text Messages
brute force
,
strings
1500
x3679
144C
Anagram Search
implementation
,
strings
1500
x3881
443B
Kolya and Tandem Repeat
brute force
,
implementation
,
strings
1500
x3964
520C
DNA Alignment
math
,
strings
1500
x4084
31B
Sysadmin Bob
greedy
,
implementation
,
strings
1500
x4100
159D
Palindrome pairs
*special problem
,
brute force
,
dp
,
strings
1500
x4247
748B
Santa Claus and Keyboard Check
implementation
,
strings
1500
x5271
50B
Choosing Symbol Pairs
strings
1500
x5526
940C
Phone Numbers
constructive algorithms
,
implementation
,
strings
1500
x5602
1181B
Split a Number
greedy
,
implementation
,
strings
1500
x6180
677C
Vanya and Label
bitmasks
,
combinatorics
,
implementation
,
strings
1500
x6274
608B
Hamming Distance Sum
combinatorics
,
strings
1500
x6471
1102D
Balanced Ternary String
greedy
,
strings
1500
x7816
1675E
Replace With the Previous, Minimize
dsu
,
greedy
,
strings
1500
x10083
1742F
Smaller
constructive algorithms
,
greedy
,
strings
1500
x10758
1307C
Cow and Message
brute force
,
dp
,
math
,
strings
1500
x11535
1950E
Nearly Shortest Repeating Substring
brute force
,
implementation
,
number theory
,
strings
1500
x11550
1326D1
Prefix-Suffix Palindrome (Easy version)
hashing
,
string suffix structures
,
strings
1500
x11597
1379A
Acacius and String
brute force
,
implementation
,
strings
1500
x11600
1800E2
Unforgivable Curse (hard version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1500
x12008
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x12252
1551C
Interesting Story
greedy
,
sortings
,
strings
1500
x12876
1553D
Backspace
dp
,
greedy
,
strings
,
two pointers
1500
x13306
701C
They Are Everywhere
binary search
,
strings
,
two pointers
1500
x13704
1404A
Balanced Bitstring
implementation
,
strings
1500
x14750
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x15594
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x18072
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x19009
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36219
130B
Gnikool Ssalg
*special problem
,
implementation
,
strings
1400
x515
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2918
898C
Phone Numbers
implementation
,
strings
1400
x5130
697B
Barnicle
brute force
,
implementation
,
math
,
strings
1400
x5664
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