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Codeforces Round 943 (Div. 3)
27:48:54
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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
#
Name
71A
Way Too Long Words
strings
800
x352717
112A
Petya and Strings
implementation
,
strings
800
x208675
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x197770
281A
Word Capitalization
implementation
,
strings
800
x195632
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x192727
59A
Word
implementation
,
strings
800
x161586
734A
Anton and Danik
implementation
,
strings
800
x139797
41A
Translation
implementation
,
strings
800
x134590
520A
Pangram
implementation
,
strings
800
x89549
785A
Anton and Polyhedrons
implementation
,
strings
800
x81988
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x77728
1703A
YES or YES?
brute force
,
implementation
,
strings
800
x62326
1367A
Short Substrings
implementation
,
strings
800
x54746
1791A
Codeforces Checking
implementation
,
strings
800
x54667
1619A
Square String?
implementation
,
strings
800
x48395
1829A
Love Story
implementation
,
strings
800
x45637
731A
Night at the Museum
implementation
,
strings
800
x43043
1760B
Atilla's Favorite Problem
greedy
,
implementation
,
strings
800
x41571
1850C
Word on the Paper
implementation
,
strings
800
x40803
1927A
Make it White
greedy
,
strings
800
x39471
1579A
Casimir's String Solitaire
math
,
strings
800
x37757
1607A
Linear Keyboard
implementation
,
strings
800
x35973
1790A
Polycarp and the Day of Pi
implementation
,
math
,
strings
800
x35574
978B
File Name
greedy
,
strings
800
x34943
1703C
Cypher
brute force
,
implementation
,
strings
800
x34038
1650A
Deletions of Two Adjacent Letters
implementation
,
strings
800
x33834
1931A
Recovering a Small String
brute force
,
strings
800
x33364
1840A
Cipher Shifer
implementation
,
strings
,
two pointers
800
x32467
1833A
Musical Puzzle
implementation
,
strings
800
x31503
1862A
Gift Carpet
dp
,
greedy
,
implementation
,
strings
800
x30619
1303A
Erasing Zeroes
implementation
,
strings
800
x30465
1811A
Insert Digit
greedy
,
math
,
strings
800
x29960
1800A
Is It a Cat?
implementation
,
strings
800
x29927
1741A
Compare T-Shirt Sizes
implementation
,
implementation
,
strings
800
x29768
1567A
Domino Disaster
implementation
,
strings
800
x29614
1914A
Problemsolving Log
implementation
,
strings
800
x29532
1729B
Decode String
greedy
,
strings
800
x29330
1807C
Find and Replace
greedy
,
implementation
,
strings
800
x29100
1220A
Cards
implementation
,
sortings
,
strings
800
x28803
1676C
Most Similar Words
brute force
,
greedy
,
implementation
,
implementation
,
math
,
strings
800
x28717
1759A
Yes-Yes?
implementation
,
strings
800
x28716
1551B1
Wonderful Coloring - 1
greedy
,
strings
800
x28624
1397A
Juggling Letters
greedy
,
strings
800
x28099
1881A
Don't Try to Count
brute force
,
strings
800
x27176
1925A
We Got Everything Covered!
constructive algorithms
,
greedy
,
strings
800
x27061
1400A
String Similarity
constructive algorithms
,
strings
800
x26538
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x26512
1846B
Rudolph and Tic-Tac-Toe
brute force
,
implementation
,
strings
800
x25994
1547B
Alphabetical Strings
greedy
,
implementation
,
strings
800
x25948
1922A
Tricky Template
constructive algorithms
,
implementation
,
strings
800
x25804
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x25408
1935A
Entertainment in MAC
constructive algorithms
,
strings
800
x25281
1832A
New Palindrome
strings
800
x24828
1481A
Space Navigation
greedy
,
strings
800
x24642
1758A
SSeeeeiinngg DDoouubbllee
constructive algorithms
,
strings
800
x24342
1539B
Love Song
dp
,
implementation
,
strings
800
x23752
1634A
Reverse and Concatenate
greedy
,
strings
800
x23633
1552A
Subsequence Permutation
sortings
,
strings
800
x23502
1684A
Digit Minimization
constructive algorithms
,
games
,
math
,
strings
800
x23450
1795A
Two Towers
brute force
,
implementation
,
strings
800
x23223
1779A
Hall of Fame
constructive algorithms
,
greedy
,
strings
800
x22879
1706A
Another String Minimization Problem
2-sat
,
constructive algorithms
,
greedy
,
string suffix structures
,
strings
800
x22542
1900A
Cover in Water
constructive algorithms
,
greedy
,
implementation
,
strings
800
x21635
1146A
Love "A"
implementation
,
strings
800
x21413
1504A
Déjà Vu
constructive algorithms
,
strings
800
x21392
855A
Tom Riddle's Diary
brute force
,
implementation
,
strings
800
x20078
1825A
LuoTianyi and the Palindrome String
greedy
,
strings
800
x19252
1301A
Three Strings
implementation
,
strings
800
x19053
1682A
Palindromic Indices
greedy
,
strings
800
x19006
1167A
Telephone Number
brute force
,
greedy
,
strings
800
x18776
1144A
Diverse Strings
implementation
,
strings
800
x18752
1796A
Typical Interview Problem
brute force
,
implementation
,
strings
800
x18547
1216A
Prefixes
strings
800
x18338
1673A
Subtle Substring Subtraction
games
,
greedy
,
strings
800
x18211
1805B
The String Has a Target
greedy
,
strings
800
x18159
1894A
Secret Sport
implementation
,
strings
800
x18066
1284A
New Year and Naming
implementation
,
strings
800
x17764
1794A
Prefix and Suffix Array
strings
800
x16534
1139A
Even Substrings
implementation
,
strings
800
x16453
1820A
Yura's New Name
implementation
,
strings
800
x16341
1617A
Forbidden Subsequence
constructive algorithms
,
greedy
,
sortings
,
strings
800
x16083
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x15850
1789B
Serval and Inversion Magic
brute force
,
implementation
,
strings
,
two pointers
800
x15752
1654B
Prefix Removals
strings
800
x15469
1898A
Milica and String
brute force
,
implementation
,
strings
800
x15002
1189A
Keanu Reeves
strings
800
x14941
1038A
Equality
implementation
,
strings
800
x14409
831B
Keyboard Layouts
implementation
,
strings
800
x14055
735A
Ostap and Grasshopper
implementation
,
strings
800
x12289
1085A
Right-Left Cipher
implementation
,
strings
800
x12059
78A
Haiku
implementation
,
strings
800
x11935
802G
Fake News (easy)
implementation
,
strings
800
x6701
99A
Help Far Away Kingdom
strings
800
x6506
1912L
LOL Lovers
strings
800
x6267
96A
Football
implementation
,
strings
900
x148764
208A
Dubstep
strings
900
x83371
977B
Two-gram
implementation
,
strings
900
x36675
1927B
Following the String
constructive algorithms
,
greedy
,
strings
900
x30153
1941C
Rudolf and the Ugly String
dp
,
greedy
,
strings
900
x29331
1915D
Unnatural Language Processing
greedy
,
implementation
,
strings
900
x27467
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