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CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!)
5 days
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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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Status
Standings
Custom test
Problems
#
Name
1575A
Another Sorting Problem
data structures
,
sortings
,
strings
1100
x4229
1369B
AccurateLee
greedy
,
implementation
,
strings
1200
x23789
1800D
Remove Two Letters
data structures
,
greedy
,
hashing
,
strings
1200
x21799
1512C
A-B Palindrome
constructive algorithms
,
implementation
,
strings
1200
x19508
1907C
Removal of Unattractive Pairs
constructive algorithms
,
greedy
,
math
,
strings
1200
x18536
1384A
Common Prefixes
constructive algorithms
,
greedy
,
strings
1200
x18397
1594C
Make Them Equal
brute force
,
greedy
,
math
,
strings
1200
x18025
1536B
Prinzessin der Verurteilung
brute force
,
constructive algorithms
,
strings
1200
x17781
1669E
2-Letter Strings
data structures
,
math
,
strings
1200
x16973
1257C
Dominated Subarray
greedy
,
implementation
,
sortings
,
strings
,
two pointers
1200
x15611
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14504
1185B
Email from Polycarp
implementation
,
strings
1200
x12905
1076A
Minimizing the String
greedy
,
strings
1200
x12852
1834C
Game with Reversing
games
,
greedy
,
math
,
strings
1200
x12682
1305B
Kuroni and Simple Strings
constructive algorithms
,
greedy
,
strings
,
two pointers
1200
x11393
1140B
Good String
implementation
,
strings
1200
x11147
625B
War of the Corporations
constructive algorithms
,
greedy
,
strings
1200
x10107
554B
Ohana Cleans Up
brute force
,
greedy
,
strings
1200
x9693
385B
Bear and Strings
brute force
,
greedy
,
implementation
,
math
,
strings
1200
x9547
708A
Letters Cyclic Shift
constructive algorithms
,
greedy
,
implementation
,
strings
1200
x8914
1023A
Single Wildcard Pattern Matching
brute force
,
implementation
,
strings
1200
x8524
1051A
Vasya And Password
greedy
,
implementation
,
strings
1200
x8320
591B
Rebranding
implementation
,
strings
1200
x8138
989B
A Tide of Riverscape
constructive algorithms
,
strings
1200
x6982
722B
Verse Pattern
implementation
,
strings
1200
x6355
151B
Phone Numbers
implementation
,
strings
1200
x6233
5B
Center Alignment
implementation
,
strings
1200
x5549
8A
Train and Peter
strings
1200
x5504
143B
Help Kingdom of Far Far Away 2
implementation
,
strings
1200
x4919
412C
Pattern
implementation
,
strings
1200
x3855
928A
Login Verification
*special problem
,
strings
1200
x3338
508B
Anton and currency you all know
greedy
,
math
,
strings
1300
x22110
1381A1
Prefix Flip (Easy Version)
constructive algorithms
,
data structures
,
strings
1300
x19869
1660C
Get an Even String
dp
,
greedy
,
strings
1300
x18825
1037C
Equalize
dp
,
greedy
,
strings
1300
x18346
1560D
Make a Power of Two
greedy
,
math
,
strings
1300
x17685
1466C
Canine poetry
dp
,
greedy
,
strings
1300
x17331
1178B
WOW Factor
dp
,
strings
1300
x14077
1553B
Reverse String
brute force
,
dp
,
hashing
,
implementation
,
strings
1300
x13844
1821C
Tear It Apart
brute force
,
implementation
,
math
,
strings
1300
x13637
1194C
From S To T
implementation
,
strings
1300
x12924
1029A
Many Equal Substrings
implementation
,
strings
1300
x12029
1187B
Letters Shop
binary search
,
implementation
,
strings
1300
x11988
1182B
Plus from Picture
dfs and similar
,
implementation
,
strings
1300
x10997
1659B
Bit Flipping
bitmasks
,
constructive algorithms
,
greedy
,
strings
1300
x10646
598B
Queries on a String
implementation
,
strings
1300
x10604
1096B
Substring Removal
combinatorics
,
math
,
strings
1300
x10348
1063A
Oh Those Palindromes
constructive algorithms
,
strings
1300
x10228
1220C
Substring Game in the Lesson
games
,
greedy
,
strings
1300
x9904
665C
Simple Strings
dp
,
greedy
,
strings
1300
x9243
1315B
Homecoming
binary search
,
dp
,
greedy
,
strings
1300
x8965
946C
String Transformation
greedy
,
strings
1300
x8769
798B
Mike and strings
brute force
,
dp
,
strings
1300
x8273
318B
Strings of Power
implementation
,
strings
,
two pointers
1300
x7381
612A
The Text Splitting
brute force
,
implementation
,
strings
1300
x7036
66A
Petya and Java
implementation
,
strings
1300
x6227
628C
Bear and String Distance
greedy
,
strings
1300
x5684
653B
Bear and Compressing
brute force
,
dfs and similar
,
dp
,
strings
1300
x4893
34C
Page Numbers
expression parsing
,
implementation
,
sortings
,
strings
1300
x4076
61B
Hard Work
strings
1300
x3789
147A
Punctuation
implementation
,
strings
1300
x3561
123A
Prime Permutation
implementation
,
number theory
,
strings
1300
x3518
291B
Command Line Arguments
*special problem
,
implementation
,
strings
1300
x3012
1363B
Subsequence Hate
implementation
,
strings
1400
x22922
1605C
Dominant Character
brute force
,
greedy
,
implementation
,
strings
1400
x16375
1624D
Palindromes Coloring
binary search
,
greedy
,
sortings
,
strings
1400
x16312
1535C
Unstable String
binary search
,
dp
,
greedy
,
implementation
,
strings
,
two pointers
1400
x16120
448B
Suffix Structures
implementation
,
strings
1400
x15669
1451C
String Equality
dp
,
greedy
,
hashing
,
implementation
,
strings
1400
x15227
1691C
Sum of Substrings
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1400
x15136
1748B
Diverse Substrings
brute force
,
implementation
,
strings
1400
x14275
1697C
awoo's Favorite Problem
binary search
,
constructive algorithms
,
data structures
,
greedy
,
implementation
,
strings
,
two pointers
1400
x13979
1845C
Strong Password
binary search
,
dp
,
greedy
,
strings
1400
x13388
1421C
Palindromifier
constructive algorithms
,
strings
1400
x12499
1800E1
Unforgivable Curse (easy version)
brute force
,
constructive algorithms
,
dsu
,
graphs
,
greedy
,
strings
1400
x12193
1844D
Row Major
constructive algorithms
,
greedy
,
math
,
number theory
,
strings
1400
x11661
1905C
Largest Subsequence
greedy
,
strings
1400
x11098
1316B
String Modification
brute force
,
constructive algorithms
,
implementation
,
sortings
,
strings
1400
x10999
1251B
Binary Palindromes
greedy
,
strings
1400
x10736
1735C
Phase Shift
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
strings
1400
x9598
525B
Pasha and String
constructive algorithms
,
greedy
,
math
,
strings
1400
x9197
182D
Common Divisors
brute force
,
hashing
,
implementation
,
math
,
strings
1400
x7831
518B
Tanya and Postcard
greedy
,
implementation
,
strings
1400
x7812
954B
String Typing
implementation
,
strings
1400
x7103
697B
Barnicle
brute force
,
implementation
,
math
,
strings
1400
x5668
898C
Phone Numbers
implementation
,
strings
1400
x5158
159C
String Manipulation 1.0
*special problem
,
binary search
,
brute force
,
data structures
,
strings
1400
x2921
130B
Gnikool Ssalg
*special problem
,
implementation
,
strings
1400
x516
550A
Two Substrings
brute force
,
dp
,
greedy
,
implementation
,
strings
1500
x36411
1368B
Codeforces Subsequences
brute force
,
constructive algorithms
,
greedy
,
math
,
strings
1500
x19068
676C
Vasya and String
binary search
,
dp
,
strings
,
two pointers
1500
x18191
1332C
K-Complete Word
dfs and similar
,
dsu
,
greedy
,
implementation
,
strings
1500
x15704
1404A
Balanced Bitstring
implementation
,
strings
1500
x14814
701C
They Are Everywhere
binary search
,
strings
,
two pointers
1500
x13847
1553D
Backspace
dp
,
greedy
,
strings
,
two pointers
1500
x13361
1551C
Interesting Story
greedy
,
sortings
,
strings
1500
x12911
1924A
Did We Get Everything Covered?
constructive algorithms
,
dp
,
greedy
,
shortest paths
,
strings
1500
x12443
1950E
Nearly Shortest Repeating Substring
brute force
,
implementation
,
number theory
,
strings
1500
x12176
1800E2
Unforgivable Curse (hard version)
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
strings
1500
x12110
1326D1
Prefix-Suffix Palindrome (Easy version)
hashing
,
string suffix structures
,
strings
1500
x11669
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