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Before contest
Codeforces Round 940 (Div. 2) and CodeCraft-23
42:15:19
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Difficulty:
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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
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Custom test
Problems
#
Name
71A
Way Too Long Words
strings
800
x351040
112A
Petya and Strings
implementation
,
strings
800
x207651
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x196753
281A
Word Capitalization
implementation
,
strings
800
x194673
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x191662
118A
String Task
implementation
,
strings
1000
x180242
59A
Word
implementation
,
strings
800
x160726
96A
Football
implementation
,
strings
900
x148160
734A
Anton and Danik
implementation
,
strings
800
x138873
41A
Translation
implementation
,
strings
800
x133858
58A
Chat room
greedy
,
strings
1000
x121529
520A
Pangram
implementation
,
strings
800
x89006
208A
Dubstep
strings
900
x83057
785A
Anton and Polyhedrons
implementation
,
strings
800
x81573
131A
cAPS lOCK
implementation
,
strings
1000
x80806
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77443
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x61800
1367A
Short Substrings
implementation
,
strings
800
x54567
1791A
Codeforces Checking
implementation
,
strings
800
x54243
43A
Football
strings
1000
x51697
1619A
Square String?
implementation
,
strings
800
x47924
1829A
Love Story
implementation
,
strings
800
x45228
1374C
Move Brackets
greedy
,
strings
1000
x43082
731A
Night at the Museum
implementation
,
strings
800
x42855
1760B
Atilla's Favorite Problem
greedy
,
implementation
,
strings
800
x41341
1850C
Word on the Paper
implementation
,
strings
800
x40468
1927A
Make it White
greedy
,
strings
800
x39172
1579A
Casimir's String Solitaire
math
,
strings
800
x37670
499B
Lecture
implementation
,
strings
1000
x37295
977B
Two-gram
implementation
,
strings
900
x36484
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36091
1607A
Linear Keyboard
implementation
,
strings
800
x35881
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35466
978B
File Name
greedy
,
strings
800
x34826
1703C
Cypher
brute force
,
implementation
,
strings
800
x33913
1650A
Deletions of Two Adjacent Letters
implementation
,
strings
800
x33757
1931A
Recovering a Small String
brute force
,
strings
800
x33161
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x32374
1833A
Musical Puzzle
implementation
,
strings
800
x31417
1862A
Gift Carpet
dp
,
greedy
,
implementation
,
strings
800
x30491
1303A
Erasing Zeroes
implementation
,
strings
800
x30322
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x29894
1811A
Insert Digit
greedy
,
math
,
strings
800
x29891
1800A
Is It a Cat?
implementation
,
strings
800
x29835
1741A
Compare T-Shirt Sizes
implementation
,
implementation
,
strings
800
x29677
1567A
Domino Disaster
implementation
,
strings
800
x29578
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x29533
1914A
Problemsolving Log
implementation
,
strings
800
x29398
1729B
Decode String
greedy
,
strings
800
x29172
1807C
Find and Replace
greedy
,
implementation
,
strings
800
x29016
1941C
Rudolf and the Ugly String
dp
,
greedy
,
strings
900
x28959
1220A
Cards
implementation
,
sortings
,
strings
800
x28752
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x28626
1759A
Yes-Yes?
implementation
,
strings
800
x28624
766A
Mahmoud and Longest Uncommon Subsequence
constructive algorithms
,
strings
1000
x28619
1551B1
Wonderful Coloring - 1
greedy
,
strings
800
x28578
1397A
Juggling Letters
greedy
,
strings
800
x28073
1324B
Yet Another Palindrome Problem
brute force
,
strings
1100
x27369
1915D
Unnatural Language Processing
greedy
,
implementation
,
strings
900
x27269
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x26926
1881A
Don't Try to Count
brute force
,
strings
800
x26920
1791D
Distinct Split
brute force
,
greedy
,
strings
1000
x26565
1400A
String Similarity
constructive algorithms
,
strings
800
x26511
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x26475
1883B
Chemistry
strings
900
x26232
746B
Decoding
implementation
,
strings
900
x26063
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x25917
1547B
Alphabetical Strings
greedy
,
implementation
,
strings
800
x25904
219A
k-String
implementation
,
strings
1000
x25862
1922A
Tricky Template
constructive algorithms
,
implementation
,
strings
800
x25673
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x25385
1935A
Entertainment in MAC
constructive algorithms
,
strings
800
x25036
1481A
Space Navigation
greedy
,
strings
800
x24627
1832A
New Palindrome
strings
800
x24603
1758A
SSeeeeiinngg DDoouubbllee
constructive algorithms
,
strings
800
x24277
1703D
Double Strings
brute force
,
data structures
,
strings
1100
x24165
1800B
Count the Number of Pairs
greedy
,
strings
1000
x23813
1539B
Love Song
dp
,
implementation
,
strings
800
x23706
1369B
AccurateLee
greedy
,
implementation
,
strings
1200
x23689
1634A
Reverse and Concatenate
greedy
,
strings
800
x23612
1552A
Subsequence Permutation
sortings
,
strings
800
x23477
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x23437
1795A
Two Towers
brute force
,
implementation
,
strings
800
x23193
1506C
Double-ended Strings
brute force
,
implementation
,
strings
1000
x23156
1342B
Binary Period
constructive algorithms
,
strings
1100
x23125
1907B
YetnotherrokenKeoard
data structures
,
implementation
,
strings
1000
x22933
1779A
Hall of Fame
constructive algorithms
,
greedy
,
strings
800
x22860
1674C
Infinite Replacement
combinatorics
,
implementation
,
strings
1000
x22817
1363B
Subsequence Hate
implementation
,
strings
1400
x22810
1606A
AB Balance
strings
900
x22598
1706A
Another String Minimization Problem
2-sat
,
constructive algorithms
,
greedy
,
string suffix structures
,
strings
800
x22521
1626B
Minor Reduction
greedy
,
strings
1100
x22266
1005B
Delete from the Left
brute force
,
implementation
,
strings
900
x22213
508B
Anton and currency you all know
greedy
,
math
,
strings
1300
x22026
1800D
Remove Two Letters
data structures
,
greedy
,
hashing
,
strings
1200
x21553
1504A
Déjà Vu
constructive algorithms
,
strings
800
x21365
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
800
x21328
1913B
Swap and Delete
strings
1000
x21262
1146A
Love "A"
implementation
,
strings
800
x21244
798A
Mike and palindrome
brute force
,
constructive algorithms
,
strings
1000
x21005
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