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Before contest
Kotlin Heroes: Practice 6
24:28:16
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Before contest
Educational Codeforces Round 105 (Rated for Div. 2)
25:28:16
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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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Status
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Custom test
Problems
#
Name
71A
Way Too Long Words
strings
800
x144750
112A
Petya and Strings
implementation
,
strings
800
x89276
339A
Helpful Maths
greedy
,
implementation
,
sortings
,
strings
800
x83723
281A
Word Capitalization
implementation
,
strings
800
x80511
236A
Boy or Girl
brute force
,
implementation
,
strings
800
x74442
59A
Word
implementation
,
strings
800
x58810
41A
Translation
implementation
,
strings
800
x55451
734A
Anton and Danik
implementation
,
strings
800
x54906
520A
Pangram
implementation
,
strings
800
x37988
785A
Anton and Polyhedrons
implementation
,
strings
800
x37498
141A
Amusing Joke
implementation
,
sortings
,
strings
800
x36076
1367A
Short Substrings
implementation
,
strings
800
x30275
731A
Night at the Museum
implementation
,
strings
800
x22318
1400A
String Similarity
constructive algorithms
,
strings
800
x21164
1397A
Juggling Letters
greedy
,
strings
800
x21025
978B
File Name
greedy
,
strings
800
x19936
1220A
Cards
implementation
,
sortings
,
strings
800
x19486
1303A
Erasing Zeroes
implementation
,
strings
800
x18852
1481A
Space Navigation
greedy
,
strings
800
x18405
1462B
Last Year's Substring
dp
,
implementation
,
strings
800
x17954
1480A
Yet Another String Game
games
,
greedy
,
strings
800
x17759
1284A
New Year and Naming
implementation
,
strings
800
x15721
1301A
Three Strings
implementation
,
strings
800
x15685
1167A
Telephone Number
brute force
,
greedy
,
strings
800
x14871
1146A
Love "A"
implementation
,
strings
800
x14630
1144A
Diverse Strings
implementation
,
strings
800
x14326
1216A
Prefixes
strings
800
x14152
1139A
Even Substrings
implementation
,
strings
800
x13631
1189A
Keanu Reeves
strings
800
x12300
1038A
Equality
implementation
,
strings
800
x11545
855A
Tom Riddle's Diary
brute force
,
implementation
,
strings
800
x10893
831B
Keyboard Layouts
implementation
,
strings
800
x10653
1085A
Right-Left Cipher
implementation
,
strings
800
x10045
735A
Ostap and Grasshopper
implementation
,
strings
800
x9740
202A
LLPS
binary search
,
bitmasks
,
brute force
,
greedy
,
implementation
,
strings
800
x8732
78A
Haiku
implementation
,
strings
800
x6326
99A
Help Far Away Kingdom
strings
800
x4260
802G
Fake News (easy)
implementation
,
strings
800
x3408
96A
Football
implementation
,
strings
900
x72269
208A
Dubstep
strings
900
x42182
977B
Two-gram
implementation
,
strings
900
x18549
746B
Decoding
implementation
,
strings
900
x14489
1291A
Even But Not Even
greedy
,
math
,
strings
900
x14204
1451B
Non-Substring Subsequence
dp
,
greedy
,
implementation
,
strings
900
x13834
1005B
Delete from the Left
brute force
,
implementation
,
strings
900
x12803
1201A
Important Exam
implementation
,
strings
900
x11426
1093B
Letters Rearranging
constructive algorithms
,
greedy
,
sortings
,
strings
900
x11390
1008A
Romaji
implementation
,
strings
900
x10420
554A
Kyoya and Photobooks
brute force
,
math
,
strings
900
x10083
1107A
Digits Sequence Dividing
greedy
,
strings
900
x9695
918B
Radio Station
implementation
,
strings
900
x9567
776A
A Serial Killer
brute force
,
implementation
,
strings
900
x8854
745A
Hongcow Learns the Cyclic Shift
implementation
,
strings
900
x8167
989A
A Blend of Springtime
implementation
,
strings
900
x8142
549A
Face Detection
implementation
,
strings
900
x7691
801B
Valued Keys
constructive algorithms
,
greedy
,
strings
900
x7588
63A
Sinking Ship
implementation
,
sortings
,
strings
900
x7056
975A
Aramic script
implementation
,
strings
900
x6996
981A
Antipalindrome
brute force
,
implementation
,
strings
900
x6983
94A
Restoring Password
implementation
,
strings
900
x6885
616A
Comparing Two Long Integers
implementation
,
strings
900
x6733
747B
Mammoth's Genome Decoding
implementation
,
strings
900
x6351
868A
Bark to Unlock
brute force
,
implementation
,
strings
900
x6342
729A
Interview with Oleg
implementation
,
strings
900
x5865
118A
String Task
implementation
,
strings
1000
x93351
58A
Chat room
greedy
,
strings
1000
x60691
131A
cAPS lOCK
implementation
,
strings
1000
x46172
1374C
Move Brackets
greedy
,
strings
1000
x23715
499B
Lecture
implementation
,
strings
1000
x20950
43A
Football
strings
1000
x20814
1473B
String LCM
brute force
,
math
,
number theory
,
strings
1000
x17232
766A
Mahmoud and Longest Uncommon Subsequence
constructive algorithms
,
strings
1000
x16080
798A
Mike and palindrome
brute force
,
constructive algorithms
,
strings
1000
x13416
219A
k-String
implementation
,
strings
1000
x13390
1251A
Broken Keyboard
brute force
,
strings
,
two pointers
1000
x12783
672B
Different is Good
constructive algorithms
,
implementation
,
strings
1000
x12317
1111A
Superhero Transformation
implementation
,
strings
1000
x12311
1243B1
Character Swap (Easy Version)
strings
1000
x11326
1027A
Palindromic Twist
implementation
,
strings
1000
x11109
1223B
Strings Equalization
strings
1000
x11077
1278A
Shuffle Hashing
brute force
,
implementation
,
strings
1000
x10922
1073A
Diverse Substring
implementation
,
strings
1000
x10536
1155A
Reverse a Substring
implementation
,
sortings
,
strings
1000
x9332
1151A
Maxim and Biology
brute force
,
strings
1000
x8776
822B
Crossword solving
brute force
,
implementation
,
strings
1000
x7813
864B
Polycarp and Letters
brute force
,
implementation
,
strings
1000
x7323
844A
Diversity
greedy
,
implementation
,
strings
1000
x7290
259A
Little Elephant and Chess
brute force
,
strings
1000
x6782
108A
Palindromic Times
implementation
,
strings
1000
x6166
452A
Eevee
brute force
,
implementation
,
strings
1000
x6158
1342B
Binary Period
constructive algorithms
,
strings
1100
x18318
1324B
Yet Another Palindrome Problem
brute force
,
strings
1100
x18133
1304B
Longest Palindrome
brute force
,
constructive algorithms
,
greedy
,
implementation
,
strings
1100
x13663
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x12047
988B
Substrings Sort
sortings
,
strings
1100
x11801
501B
Misha and Changing Handles
data structures
,
dsu
,
strings
1100
x10042
721B
Passwords
implementation
,
math
,
sortings
,
strings
1100
x9793
186A
Comparing Strings
implementation
,
strings
1100
x9313
877A
Alex and broken contest
implementation
,
strings
1100
x8833
525A
Vitaliy and Pie
greedy
,
hashing
,
strings
1100
x8777
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