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Before contest
CodeCraft-22 and Codeforces Round #795 (Div. 2)
3 days
→ Filter Problems
Difficulty:
—
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
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Status
Standings
Custom test
Problems
#
Name
71A
Way Too Long Words
strings
800
x221183
112A
Petya and Strings
implementation
,
strings
800
x134568
118A
String Task
implementation
,
strings
1000
x126959
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x125763
281A
Word Capitalization
implementation
,
strings
800
x122335
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x116321
96A
Football
implementation
,
strings
900
x101030
59A
Word
implementation
,
strings
800
x97023
58A
Chat room
greedy
,
strings
1000
x84679
41A
Translation
implementation
,
strings
800
x83728
734A
Anton and Danik
implementation
,
strings
800
x83694
131A
cAPS lOCK
implementation
,
strings
1000
x59135
208A
Dubstep
strings
900
x58603
520A
Pangram
implementation
,
strings
800
x55053
785A
Anton and Polyhedrons
implementation
,
strings
800
x52353
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x52333
1367A
Short Substrings
implementation
,
strings
800
x40526
43A
Football
strings
1000
x31745
1374C
Move Brackets
greedy
,
strings
1000
x31179
1619A
Square String?
implementation
,
strings
800
x30152
1579A
Casimir's String Solitaire
math
,
strings
800
x29914
731A
Night at the Museum
implementation
,
strings
800
x29641
1607A
Linear Keyboard
implementation
,
strings
800
x28077
499B
Lecture
implementation
,
strings
1000
x27756
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x27240
1650A
Deletions of Two Adjacent Letters
implementation
,
strings
800
x26313
978B
File Name
greedy
,
strings
800
x26126
977B
Two-gram
implementation
,
strings
900
x25392
1397A
Juggling Letters
greedy
,
strings
800
x24947
1567A
Domino Disaster
implementation
,
strings
800
x24729
1551B1
Wonderful Coloring - 1
greedy
,
strings
800
x24656
1400A
String Similarity
constructive algorithms
,
strings
800
x24290
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x23135
1220A
Cards
implementation
,
sortings
,
strings
800
x22974
1303A
Erasing Zeroes
implementation
,
strings
800
x22933
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x22913
1547B
Alphabetical Strings
greedy
,
implementation
,
strings
800
x22558
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x22480
1324B
Yet Another Palindrome Problem
brute force
,
strings
1100
x22429
1481A
Space Navigation
greedy
,
strings
800
x22281
1634A
Reverse and Concatenate
greedy
,
strings
800
x20956
1342B
Binary Period
constructive algorithms
,
strings
1100
x20894
1369B
AccurateLee
greedy
,
implementation
,
strings
1200
x20598
1552A
Subsequence Permutation
sortings
,
strings
800
x20592
766A
Mahmoud and Longest Uncommon Subsequence
constructive algorithms
,
strings
1000
x20128
1539B
Love Song
dp
,
implementation
,
strings
800
x19764
1506C
Double-ended Strings
brute force
,
implementation
,
strings
1000
x19275
1504A
Déjà Vu
constructive algorithms
,
strings
800
x19036
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x19034
1363B
Subsequence Hate
implementation
,
strings
1400
x18563
746B
Decoding
implementation
,
strings
900
x18344
219A
k-String
implementation
,
strings
1000
x18271
508B
Anton and currency you all know
greedy
,
math
,
strings
1300
x18244
1146A
Love "A"
implementation
,
strings
800
x17819
1626B
Minor Reduction
greedy
,
strings
1100
x17761
1301A
Three Strings
implementation
,
strings
800
x17697
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x17576
1496A
Split it!
brute force
,
constructive algorithms
,
greedy
,
strings
900
x17572
1381A1
Prefix Flip (Easy Version)
constructive algorithms
,
data structures
,
strings
1300
x17409
1606A
AB Balance
strings
900
x17253
1451B
Non-Substring Subsequence
dp
,
greedy
,
implementation
,
strings
900
x17070
1284A
New Year and Naming
implementation
,
strings
800
x16909
1167A
Telephone Number
brute force
,
greedy
,
strings
800
x16800
1291A
Even But Not Even
greedy
,
math
,
strings
900
x16707
798A
Mike and palindrome
brute force
,
constructive algorithms
,
strings
1000
x16678
1216A
Prefixes
strings
800
x16576
1384A
Common Prefixes
constructive algorithms
,
greedy
,
strings
1200
x16457
1005B
Delete from the Left
brute force
,
implementation
,
strings
900
x16362
1144A
Diverse Strings
implementation
,
strings
800
x16229
1304B
Longest Palindrome
brute force
,
constructive algorithms
,
greedy
,
implementation
,
strings
1100
x15849
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x15739
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x15682
1512C
A-B Palindrome
constructive algorithms
,
implementation
,
strings
1200
x15615
1037C
Equalize
dp
,
greedy
,
strings
1300
x15435
1616B
Mirror in the String
greedy
,
strings
1100
x15420
1251A
Broken Keyboard
brute force
,
strings
,
two pointers
1000
x15338
1673A
Subtle Substring Subtraction
games
,
greedy
,
strings
800
x15050
1139A
Even Substrings
implementation
,
strings
800
x15049
1674C
Infinite Replacement
combinatorics
,
implementation
,
strings
1000
x15016
1466C
Canine poetry
dp
,
greedy
,
strings
1300
x15012
1111A
Superhero Transformation
implementation
,
strings
1000
x14990
1536B
Prinzessin der Verurteilung
brute force
,
constructive algorithms
,
strings
1200
x14816
988B
Substrings Sort
sortings
,
strings
1100
x14489
1617A
Forbidden Subsequence
constructive algorithms
,
greedy
,
sortings
,
strings
800
x14388
672B
Different is Good
constructive algorithms
,
implementation
,
strings
1000
x14319
855A
Tom Riddle's Diary
brute force
,
implementation
,
strings
800
x14221
1560D
Make a Power of Two
greedy
,
math
,
strings
1300
x14129
1682A
Palindromic Indices
greedy
,
strings
800
x13872
1654B
Prefix Removals
strings
800
x13761
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x13731
1189A
Keanu Reeves
strings
800
x13609
1093B
Letters Rearranging
constructive algorithms
,
greedy
,
sortings
,
strings
900
x13607
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x13429
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x13417
1278A
Shuffle Hashing
brute force
,
implementation
,
strings
1000
x13124
1201A
Important Exam
implementation
,
strings
900
x13084
1243B1
Character Swap (Easy Version)
strings
1000
x13025
1594C
Make Them Equal
brute force
,
greedy
,
math
,
strings
1200
x12928
1660C
Get an Even String
dp
,
greedy
,
strings
1300
x12905
1038A
Equality
implementation
,
strings
800
x12862
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